diff --git a/03-create.html b/03-create.html
index a2b5695fd7..ea1abb9942 100644
--- a/03-create.html
+++ b/03-create.html
@@ -489,7 +489,7 @@ <h4 class="accordion-header" id="headingSolution1">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <p>No. Dracula does not need to make the <code>moons</code> subdirectory
 a Git repository because the <code>planets</code> repository can track
@@ -540,7 +540,7 @@ <h4 class="accordion-header" id="headingSolution2">
   Solution – USE WITH CAUTION!
   </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <div class="section level3">
 <h3 id="background">Background<a class="anchor" aria-label="anchor" href="#background"></a></h3>
diff --git a/05-history.html b/05-history.html
index 5955c7cc81..893f30fc18 100644
--- a/05-history.html
+++ b/05-history.html
@@ -704,7 +704,7 @@ <h4 class="accordion-header" id="headingSolution1">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>The answer is (5)-Both 2 and 4.</p>
 <p>The <code>checkout</code> command restores files from the repository,
@@ -766,7 +766,7 @@ <h4 class="accordion-header" id="headingSolution2">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>The command <code>git log</code> lists project history with commit
 IDs.</p>
@@ -829,7 +829,7 @@ <h4 class="accordion-header" id="headingSolution3">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
 <div class="accordion-body">
 <p>The answer is 2.</p>
 <p>The command <code>git add venus.txt</code> places the current version
@@ -895,7 +895,7 @@ <h4 class="accordion-header" id="headingSolution4">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
 <div class="accordion-body">
 <p>After adding a change, <code>git checkout</code> can not be used
 directly. Let’s look at the output of <code>git status</code>:</p>
diff --git a/07-github.html b/07-github.html
index afc57efa7c..97618c48aa 100644
--- a/07-github.html
+++ b/07-github.html
@@ -814,7 +814,7 @@ <h4 class="accordion-header" id="headingSolution1">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <p>The left-most button (with the picture of a clipboard) copies the
 full identifier of the commit to the clipboard. In the shell,
@@ -878,7 +878,7 @@ <h4 class="accordion-header" id="headingSolution2">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <p>GitHub displays timestamps in a human readable relative format
 (i.e. “22 hours ago” or “three weeks ago”). However, if you hover over
@@ -908,7 +908,7 @@ <h4 class="accordion-header" id="headingSolution3">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
 <div class="accordion-body">
 <p>When we push changes, we’re interacting with a remote repository to
 update it with the changes we’ve made locally (often this corresponds to
@@ -940,7 +940,7 @@ <h4 class="accordion-header" id="headingSolution4">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
 <div class="accordion-body">
 <p>In this case, we’d see a merge conflict due to unrelated histories.
 When GitHub creates a README.md file, it performs a commit in the remote
diff --git a/09-conflict.html b/09-conflict.html
index 2bcb4c2a49..775216c4db 100644
--- a/09-conflict.html
+++ b/09-conflict.html
@@ -697,7 +697,7 @@ <h4 class="accordion-header" id="headingSolution1">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <p>Let’s try it. Suppose Dracula takes a picture of Martian surface and
 calls it <code>mars.jpg</code>.</p>
@@ -917,7 +917,7 @@ <h4 class="accordion-header" id="headingSolution2">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <table class="table"><colgroup><col width="6%"><col width="34%"><col width="59%"></colgroup><thead><tr class="header"><th>order</th>
 <th>action . . . . . .</th>
diff --git a/14-supplemental-rstudio.html b/14-supplemental-rstudio.html
index 1fe26369d6..cbe6a3b802 100644
--- a/14-supplemental-rstudio.html
+++ b/14-supplemental-rstudio.html
@@ -495,7 +495,7 @@ <h4 class="accordion-header" id="headingSolution1">
   Solution to Challenge
   </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>This can be done in Rstudio:</p>
 <div class="codewrapper sourceCode" id="cb1">
diff --git a/aio.html b/aio.html
index 29b04b644d..4b6fe2a66b 100644
--- a/aio.html
+++ b/aio.html
@@ -1054,7 +1054,7 @@ <h4 class="accordion-header" id="headingSolution1">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <p>No. Dracula does not need to make the <code>moons</code> subdirectory
 a Git repository because the <code>planets</code> repository can track
@@ -1105,7 +1105,7 @@ <h4 class="accordion-header" id="headingSolution2">
   Solution – USE WITH CAUTION!
   </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <div class="section level3">
 <h3 id="background">Background<a class="anchor" aria-label="anchor" href="#background"></a>
@@ -2462,7 +2462,7 @@ <h4 class="accordion-header" id="headingSolution1">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>The answer is (5)-Both 2 and 4.</p>
 <p>The <code>checkout</code> command restores files from the repository,
@@ -2526,7 +2526,7 @@ <h4 class="accordion-header" id="headingSolution2">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>The command <code>git log</code> lists project history with commit
 IDs.</p>
@@ -2591,7 +2591,7 @@ <h4 class="accordion-header" id="headingSolution3">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
 <div class="accordion-body">
 <p>The answer is 2.</p>
 <p>The command <code>git add venus.txt</code> places the current version
@@ -2657,7 +2657,7 @@ <h4 class="accordion-header" id="headingSolution4">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
 <div class="accordion-body">
 <p>After adding a change, <code>git checkout</code> can not be used
 directly. Let’s look at the output of <code>git status</code>:</p>
@@ -3752,7 +3752,7 @@ <h4 class="accordion-header" id="headingSolution1">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <p>The left-most button (with the picture of a clipboard) copies the
 full identifier of the commit to the clipboard. In the shell,
@@ -3816,7 +3816,7 @@ <h4 class="accordion-header" id="headingSolution2">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <p>GitHub displays timestamps in a human readable relative format
 (i.e. “22 hours ago” or “three weeks ago”). However, if you hover over
@@ -3846,7 +3846,7 @@ <h4 class="accordion-header" id="headingSolution3">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
 <div class="accordion-body">
 <p>When we push changes, we’re interacting with a remote repository to
 update it with the changes we’ve made locally (often this corresponds to
@@ -3878,7 +3878,7 @@ <h4 class="accordion-header" id="headingSolution4">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
 <div class="accordion-body">
 <p>In this case, we’d see a merge conflict due to unrelated histories.
 When GitHub creates a README.md file, it performs a commit in the remote
@@ -4653,7 +4653,7 @@ <h4 class="accordion-header" id="headingSolution1">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <p>Let’s try it. Suppose Dracula takes a picture of Martian surface and
 calls it <code>mars.jpg</code>.</p>
@@ -4898,7 +4898,7 @@ <h4 class="accordion-header" id="headingSolution2">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <table class="table">
 <colgroup>
@@ -5693,7 +5693,7 @@ <h4 class="accordion-header" id="headingSolution1">
   Solution to Challenge
   </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>This can be done in Rstudio:</p>
 <div class="codewrapper sourceCode" id="cb1">
diff --git a/index.html b/index.html
index 3f71e89535..ffc6b43fa8 100644
--- a/index.html
+++ b/index.html
@@ -141,6 +141,7 @@ <h2 class="accordion-header chapters" id="flush-headingEleven">
     <div id="flush-collapsecurrent" class="accordion-collapse collapse show" aria-labelledby="flush-headingcurrent" data-bs-parent="#accordionFlushcurrent">
       <div class="accordion-body">
         <ul><li><a href="#installing-git">Installing Git</a></li>
+<li><a href="#creating-a-github-account">Creating a GitHub Account</a></li>
 <li><a href="#preparing-your-working-directory">Preparing Your Working Directory</a></li>
         </ul></div><!--/div.accordion-body-->
     </div><!--/div.accordion-collapse-->
@@ -386,7 +387,43 @@ <h3 class="callout-title">Prerequisites<a class="anchor" aria-label="anchor" hre
 installation on MacOS</a></li>
 <li><a href="https://carpentries.github.io/workshop-template/install_instructions/#git" class="external-link">Git
 installation on Linux</a></li>
-</ul></section><section id="preparing-your-working-directory"><h2 class="section-heading">Preparing Your Working Directory<a class="anchor" aria-label="anchor" href="#preparing-your-working-directory"></a>
+</ul></section><section id="creating-a-github-account"><h2 class="section-heading">Creating a GitHub Account<a class="anchor" aria-label="anchor" href="#creating-a-github-account"></a>
+</h2>
+<hr class="half-width"><p>You will need an account for <a href="https://github.com" class="external-link">GitHub</a>
+to follow episodes 7 &amp; 8 in this lesson.</p>
+<ol style="list-style-type: decimal"><li>Go to <a href="https://github.com" class="external-link uri">https://github.com</a> and follow the “Sign up” link at the
+top-right of the window.</li>
+<li>Follow the instructions to create an account.</li>
+<li>Verify your email address with GitHub.</li>
+<li>Configure multifactor authentication (see below).</li>
+</ol><div class="section level3">
+<h3 id="multi-factor-authentication">Multi-factor Authentication<a class="anchor" aria-label="anchor" href="#multi-factor-authentication"></a></h3>
+<p>In 2023, GitHub introduced a requirement for all accounts to have <a href="https://docs.github.com/en/authentication/securing-your-account-with-two-factor-authentication-2fa/about-two-factor-authentication" class="external-link">multi-factor
+authentication (2FA)</a> configured for extra security. Several options
+exist for setting up 2FA, which are summarised here:</p>
+<ol style="list-style-type: decimal"><li>If you already use an authenticator app, like <a href="https://support.google.com/accounts/answer/1066447?hl=en&amp;co=GENIE.Platform%3DiOS&amp;oco=0" class="external-link">Google
+Authenticator</a> or <a href="https://duo.com/product/multi-factor-authentication-mfa/duo-mobile-app" class="external-link">Duo
+Mobile</a> on your smartphone for example, <a href="https://docs.github.com/en/authentication/securing-your-account-with-two-factor-authentication-2fa/configuring-two-factor-authentication#configuring-two-factor-authentication-using-a-totp-mobile-app" class="external-link">add
+GitHub to that app</a>.</li>
+<li>If you have access to a smartphone but do not already use an
+authenticator app, install one and <a href="https://docs.github.com/en/authentication/securing-your-account-with-two-factor-authentication-2fa/configuring-two-factor-authentication#configuring-two-factor-authentication-using-a-totp-mobile-app" class="external-link">add
+GitHub to the app</a>.</li>
+<li>If you do not have access to a smartphone or do not want to install
+an authenticator app, you have two options:
+<ol style="list-style-type: decimal"><li>
+<a href="https://docs.github.com/en/authentication/securing-your-account-with-two-factor-authentication-2fa/configuring-two-factor-authentication#configuring-two-factor-authentication-using-text-messages" class="external-link">set
+up 2FA via text message</a> (<a href="https://docs.github.com/en/authentication/securing-your-account-with-two-factor-authentication-2fa/countries-where-sms-authentication-is-supported" class="external-link">list
+of countries where authentication by SMS is supported</a>), or</li>
+<li>
+<a href="https://docs.github.com/en/authentication/securing-your-account-with-two-factor-authentication-2fa/configuring-two-factor-authentication#configuring-two-factor-authentication-using-a-security-key" class="external-link">use
+a hardware security key</a> like <a href="https://www.yubico.com/products/yubikey-5-overview/" class="external-link">YubiKey</a>
+or the <a href="https://store.google.com/us/product/titan_security_key?hl=en-US&amp;pli=1" class="external-link">Google
+Titan key</a>.</li>
+</ol></li>
+</ol><p>The GitHub documentation provides <a href="https://docs.github.com/en/authentication/securing-your-account-with-two-factor-authentication-2fa/configuring-two-factor-authentication" class="external-link">more
+details about configuring 2FA</a>.</p>
+<hr></div>
+</section><section id="preparing-your-working-directory"><h2 class="section-heading">Preparing Your Working Directory<a class="anchor" aria-label="anchor" href="#preparing-your-working-directory"></a>
 </h2>
 <hr class="half-width"><p>We’ll do our work in the <code>Desktop</code> folder so make sure you
 change your working directory to it with:</p>
diff --git a/instructor/03-create.html b/instructor/03-create.html
index eb8866d89a..7765780fd6 100644
--- a/instructor/03-create.html
+++ b/instructor/03-create.html
@@ -490,7 +490,7 @@ <h4 class="accordion-header" id="headingSolution1">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <p>No. Dracula does not need to make the <code>moons</code> subdirectory
 a Git repository because the <code>planets</code> repository can track
@@ -541,7 +541,7 @@ <h4 class="accordion-header" id="headingSolution2">
   Solution – USE WITH CAUTION!
   </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <div class="section level3">
 <h3 id="background">Background<a class="anchor" aria-label="anchor" href="#background"></a></h3>
diff --git a/instructor/05-history.html b/instructor/05-history.html
index 7a6987f35c..54402e095d 100644
--- a/instructor/05-history.html
+++ b/instructor/05-history.html
@@ -705,7 +705,7 @@ <h4 class="accordion-header" id="headingSolution1">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>The answer is (5)-Both 2 and 4.</p>
 <p>The <code>checkout</code> command restores files from the repository,
@@ -767,7 +767,7 @@ <h4 class="accordion-header" id="headingSolution2">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>The command <code>git log</code> lists project history with commit
 IDs.</p>
@@ -830,7 +830,7 @@ <h4 class="accordion-header" id="headingSolution3">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
 <div class="accordion-body">
 <p>The answer is 2.</p>
 <p>The command <code>git add venus.txt</code> places the current version
@@ -896,7 +896,7 @@ <h4 class="accordion-header" id="headingSolution4">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
 <div class="accordion-body">
 <p>After adding a change, <code>git checkout</code> can not be used
 directly. Let’s look at the output of <code>git status</code>:</p>
diff --git a/instructor/07-github.html b/instructor/07-github.html
index b364e857d6..7dd8ff0e70 100644
--- a/instructor/07-github.html
+++ b/instructor/07-github.html
@@ -815,7 +815,7 @@ <h4 class="accordion-header" id="headingSolution1">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <p>The left-most button (with the picture of a clipboard) copies the
 full identifier of the commit to the clipboard. In the shell,
@@ -879,7 +879,7 @@ <h4 class="accordion-header" id="headingSolution2">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <p>GitHub displays timestamps in a human readable relative format
 (i.e. “22 hours ago” or “three weeks ago”). However, if you hover over
@@ -909,7 +909,7 @@ <h4 class="accordion-header" id="headingSolution3">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
 <div class="accordion-body">
 <p>When we push changes, we’re interacting with a remote repository to
 update it with the changes we’ve made locally (often this corresponds to
@@ -941,7 +941,7 @@ <h4 class="accordion-header" id="headingSolution4">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
 <div class="accordion-body">
 <p>In this case, we’d see a merge conflict due to unrelated histories.
 When GitHub creates a README.md file, it performs a commit in the remote
diff --git a/instructor/09-conflict.html b/instructor/09-conflict.html
index e0fa6b3ca1..86a561ccfb 100644
--- a/instructor/09-conflict.html
+++ b/instructor/09-conflict.html
@@ -698,7 +698,7 @@ <h4 class="accordion-header" id="headingSolution1">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <p>Let’s try it. Suppose Dracula takes a picture of Martian surface and
 calls it <code>mars.jpg</code>.</p>
@@ -918,7 +918,7 @@ <h4 class="accordion-header" id="headingSolution2">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <table class="table"><colgroup><col width="6%"><col width="34%"><col width="59%"></colgroup><thead><tr class="header"><th>order</th>
 <th>action . . . . . .</th>
diff --git a/instructor/14-supplemental-rstudio.html b/instructor/14-supplemental-rstudio.html
index 6ee56359a8..86d1492083 100644
--- a/instructor/14-supplemental-rstudio.html
+++ b/instructor/14-supplemental-rstudio.html
@@ -496,7 +496,7 @@ <h4 class="accordion-header" id="headingSolution1">
   Solution to Challenge
   </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>This can be done in Rstudio:</p>
 <div class="codewrapper sourceCode" id="cb1">
diff --git a/instructor/aio.html b/instructor/aio.html
index 6f97c3be88..63c6498f28 100644
--- a/instructor/aio.html
+++ b/instructor/aio.html
@@ -1053,7 +1053,7 @@ <h4 class="accordion-header" id="headingSolution1">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <p>No. Dracula does not need to make the <code>moons</code> subdirectory
 a Git repository because the <code>planets</code> repository can track
@@ -1104,7 +1104,7 @@ <h4 class="accordion-header" id="headingSolution2">
   Solution – USE WITH CAUTION!
   </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <div class="section level3">
 <h3 id="background">Background<a class="anchor" aria-label="anchor" href="#background"></a>
@@ -2463,7 +2463,7 @@ <h4 class="accordion-header" id="headingSolution1">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>The answer is (5)-Both 2 and 4.</p>
 <p>The <code>checkout</code> command restores files from the repository,
@@ -2527,7 +2527,7 @@ <h4 class="accordion-header" id="headingSolution2">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>The command <code>git log</code> lists project history with commit
 IDs.</p>
@@ -2592,7 +2592,7 @@ <h4 class="accordion-header" id="headingSolution3">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
 <div class="accordion-body">
 <p>The answer is 2.</p>
 <p>The command <code>git add venus.txt</code> places the current version
@@ -2658,7 +2658,7 @@ <h4 class="accordion-header" id="headingSolution4">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
 <div class="accordion-body">
 <p>After adding a change, <code>git checkout</code> can not be used
 directly. Let’s look at the output of <code>git status</code>:</p>
@@ -3755,7 +3755,7 @@ <h4 class="accordion-header" id="headingSolution1">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <p>The left-most button (with the picture of a clipboard) copies the
 full identifier of the commit to the clipboard. In the shell,
@@ -3819,7 +3819,7 @@ <h4 class="accordion-header" id="headingSolution2">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <p>GitHub displays timestamps in a human readable relative format
 (i.e. “22 hours ago” or “three weeks ago”). However, if you hover over
@@ -3849,7 +3849,7 @@ <h4 class="accordion-header" id="headingSolution3">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
 <div class="accordion-body">
 <p>When we push changes, we’re interacting with a remote repository to
 update it with the changes we’ve made locally (often this corresponds to
@@ -3881,7 +3881,7 @@ <h4 class="accordion-header" id="headingSolution4">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
 <div class="accordion-body">
 <p>In this case, we’d see a merge conflict due to unrelated histories.
 When GitHub creates a README.md file, it performs a commit in the remote
@@ -4658,7 +4658,7 @@ <h4 class="accordion-header" id="headingSolution1">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <p>Let’s try it. Suppose Dracula takes a picture of Martian surface and
 calls it <code>mars.jpg</code>.</p>
@@ -4903,7 +4903,7 @@ <h4 class="accordion-header" id="headingSolution2">
   Show me the solution
   </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <table class="table">
 <colgroup>
@@ -5703,7 +5703,7 @@ <h4 class="accordion-header" id="headingSolution1">
   Solution to Challenge
   </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>This can be done in Rstudio:</p>
 <div class="codewrapper sourceCode" id="cb1">
diff --git a/instructor/index.html b/instructor/index.html
index 2b968545e0..6d4eac9568 100644
--- a/instructor/index.html
+++ b/instructor/index.html
@@ -519,7 +519,43 @@ <h3 class="callout-title">Prerequisites<a class="anchor" aria-label="anchor" hre
 installation on MacOS</a></li>
 <li><a href="https://carpentries.github.io/workshop-template/install_instructions/#git" class="external-link">Git
 installation on Linux</a></li>
-</ul></section><section id="preparing-your-working-directory"><h2 class="section-heading">Preparing Your Working Directory<a class="anchor" aria-label="anchor" href="#preparing-your-working-directory"></a>
+</ul></section><section id="creating-a-github-account"><h2 class="section-heading">Creating a GitHub Account<a class="anchor" aria-label="anchor" href="#creating-a-github-account"></a>
+</h2>
+<hr class="half-width"><p>You will need an account for <a href="https://github.com" class="external-link">GitHub</a>
+to follow episodes 7 &amp; 8 in this lesson.</p>
+<ol style="list-style-type: decimal"><li>Go to <a href="https://github.com" class="external-link uri">https://github.com</a> and follow the “Sign up” link at the
+top-right of the window.</li>
+<li>Follow the instructions to create an account.</li>
+<li>Verify your email address with GitHub.</li>
+<li>Configure multifactor authentication (see below).</li>
+</ol><div class="section level3">
+<h3 id="multi-factor-authentication">Multi-factor Authentication<a class="anchor" aria-label="anchor" href="#multi-factor-authentication"></a></h3>
+<p>In 2023, GitHub introduced a requirement for all accounts to have <a href="https://docs.github.com/en/authentication/securing-your-account-with-two-factor-authentication-2fa/about-two-factor-authentication" class="external-link">multi-factor
+authentication (2FA)</a> configured for extra security. Several options
+exist for setting up 2FA, which are summarised here:</p>
+<ol style="list-style-type: decimal"><li>If you already use an authenticator app, like <a href="https://support.google.com/accounts/answer/1066447?hl=en&amp;co=GENIE.Platform%3DiOS&amp;oco=0" class="external-link">Google
+Authenticator</a> or <a href="https://duo.com/product/multi-factor-authentication-mfa/duo-mobile-app" class="external-link">Duo
+Mobile</a> on your smartphone for example, <a href="https://docs.github.com/en/authentication/securing-your-account-with-two-factor-authentication-2fa/configuring-two-factor-authentication#configuring-two-factor-authentication-using-a-totp-mobile-app" class="external-link">add
+GitHub to that app</a>.</li>
+<li>If you have access to a smartphone but do not already use an
+authenticator app, install one and <a href="https://docs.github.com/en/authentication/securing-your-account-with-two-factor-authentication-2fa/configuring-two-factor-authentication#configuring-two-factor-authentication-using-a-totp-mobile-app" class="external-link">add
+GitHub to the app</a>.</li>
+<li>If you do not have access to a smartphone or do not want to install
+an authenticator app, you have two options:
+<ol style="list-style-type: decimal"><li>
+<a href="https://docs.github.com/en/authentication/securing-your-account-with-two-factor-authentication-2fa/configuring-two-factor-authentication#configuring-two-factor-authentication-using-text-messages" class="external-link">set
+up 2FA via text message</a> (<a href="https://docs.github.com/en/authentication/securing-your-account-with-two-factor-authentication-2fa/countries-where-sms-authentication-is-supported" class="external-link">list
+of countries where authentication by SMS is supported</a>), or</li>
+<li>
+<a href="https://docs.github.com/en/authentication/securing-your-account-with-two-factor-authentication-2fa/configuring-two-factor-authentication#configuring-two-factor-authentication-using-a-security-key" class="external-link">use
+a hardware security key</a> like <a href="https://www.yubico.com/products/yubikey-5-overview/" class="external-link">YubiKey</a>
+or the <a href="https://store.google.com/us/product/titan_security_key?hl=en-US&amp;pli=1" class="external-link">Google
+Titan key</a>.</li>
+</ol></li>
+</ol><p>The GitHub documentation provides <a href="https://docs.github.com/en/authentication/securing-your-account-with-two-factor-authentication-2fa/configuring-two-factor-authentication" class="external-link">more
+details about configuring 2FA</a>.</p>
+<hr></div>
+</section><section id="preparing-your-working-directory"><h2 class="section-heading">Preparing Your Working Directory<a class="anchor" aria-label="anchor" href="#preparing-your-working-directory"></a>
 </h2>
 <hr class="half-width"><p>We’ll do our work in the <code>Desktop</code> folder so make sure you
 change your working directory to it with:</p>
diff --git a/md5sum.txt b/md5sum.txt
index c6a51b2509..ff50ddeaa7 100644
--- a/md5sum.txt
+++ b/md5sum.txt
@@ -20,5 +20,5 @@
 "instructors/instructor-notes.md" "8711174c9d3e1f433cdcf9b30cd571d9" "site/built/instructor-notes.md" "2023-09-18"
 "learners/discuss.md" "8893316c5cf0dee6a42dd818f6e21122" "site/built/discuss.md" "2023-09-18"
 "learners/reference.md" "d976a57639fa49361d9c8431850cde6a" "site/built/reference.md" "2023-05-08"
-"learners/setup.md" "23b85ccb109a06c5d61c976b31735e35" "site/built/setup.md" "2023-07-26"
+"learners/setup.md" "19ccf15a75716fe39f1116abf68a380d" "site/built/setup.md" "2023-09-26"
 "profiles/learner-profiles.md" "60b93493cf1da06dfd63255d73854461" "site/built/learner-profiles.md" "2023-05-08"
diff --git a/pkgdown.yml b/pkgdown.yml
index 24643e0159..73edb874fa 100644
--- a/pkgdown.yml
+++ b/pkgdown.yml
@@ -2,5 +2,5 @@ pandoc: 2.19.2
 pkgdown: 2.0.7
 pkgdown_sha: ~
 articles: {}
-last_built: 2023-09-26T00:05Z
+last_built: 2023-09-26T15:00Z