diff --git a/.markdownlint.jsonc b/.markdownlint.jsonc
index b7f0923..fbe8a94 100644
--- a/.markdownlint.jsonc
+++ b/.markdownlint.jsonc
@@ -172,7 +172,15 @@
 	// MD033/no-inline-html - Inline HTML
 	"MD033": {
 		// Allowed elements
-		"allowed_elements": ["summary", "details", "br", "strong", "code", "a"]
+		"allowed_elements": [
+			"summary",
+			"details",
+			"br",
+			"strong",
+			"code",
+			"a",
+			"sup"
+		]
 	},
 
 	// MD034/no-bare-urls - Bare URL used
@@ -200,15 +208,10 @@
 	"MD039": true,
 
 	// MD040/fenced-code-language - Fenced code blocks should have a language specified
-	"MD040": true,
+	"MD040": false,
 
 	// MD041/first-line-heading/first-line-h1 - First line in a file should be a top-level heading
-	"MD041": {
-		// Heading level
-		"level": 1,
-		// RegExp for matching title in front matter
-		"front_matter_title": "^\\s*title\\s*[:=]"
-	},
+	"MD041": false,
 
 	// MD042/no-empty-links - No empty links
 	"MD042": true,
diff --git a/02-just-enough-dom/README.md b/02-just-enough-dom/README.md
index db963c0..16dda63 100644
--- a/02-just-enough-dom/README.md
+++ b/02-just-enough-dom/README.md
@@ -87,14 +87,14 @@ output, and defining user interactions with event listeners.
 
 ```html
 <div>
-	<button id="echo-button">echo</button>
+ <button id="echo-button">echo</button>
 </div>
 
 <script>
-	// --- save important DOM elements to variables ---
-	const echoButtonEl = document.getElementById('echo-button');
+ // --- save important DOM elements to variables ---
+ const echoButtonEl = document.getElementById('echo-button');
 
-	console.log(echoButtonEl);
+ console.log(echoButtonEl);
 </script>
 ```
 
@@ -111,20 +111,20 @@ the syntax below and will have more freedom when writing your programs.
 
 ```html
 <div>
-	<button id="echo-button">echo</button>
+ <button id="echo-button">echo</button>
 </div>
 
 <script>
-	// --- save important DOM elements to variables ---
-	const echoButtonEl = document.getElementById('echo-button');
-
-	// --- add event listeners + handlers ---
-	// you can just use this syntax for now without understanding it
-	//  soon you will learn about functions and callbacks
-	echoButtonEl.addEventListener('click', () => {
-		console.log('hello developer');
-		alert('hello user');
-	});
+ // --- save important DOM elements to variables ---
+ const echoButtonEl = document.getElementById('echo-button');
+
+ // --- add event listeners + handlers ---
+ // you can just use this syntax for now without understanding it
+ //  soon you will learn about functions and callbacks
+ echoButtonEl.addEventListener('click', () => {
+  console.log('hello developer');
+  alert('hello user');
+ });
 </script>
 ```
 
@@ -137,22 +137,22 @@ module's examples and exercises.
 
 ```html
 <div>
-	<input id="user-text" />
-	<br />
-	<button id="echo-button">echo</button>
+ <input id="user-text" />
+ <br />
+ <button id="echo-button">echo</button>
 </div>
 
 <script>
-	// --- save important DOM elements to variables ---
-	const userTextEl = document.getElementById('user-text');
-	const echoButtonEl = document.getElementById('echo-button');
-
-	// --- add event listeners + handlers ---
-	echoButtonEl.addEventListener('click', () => {
-		const userInput = userTextEl.value;
-		console.log(userInput);
-		alert(userInput);
-	});
+ // --- save important DOM elements to variables ---
+ const userTextEl = document.getElementById('user-text');
+ const echoButtonEl = document.getElementById('echo-button');
+
+ // --- add event listeners + handlers ---
+ echoButtonEl.addEventListener('click', () => {
+  const userInput = userTextEl.value;
+  console.log(userInput);
+  alert(userInput);
+ });
 </script>
 ```
 
@@ -164,29 +164,29 @@ information to a user with the DOM, and more than enough for this module.
 
 ```html
 <div>
-	<input id="user-text" />
-	<br />
-	<button id="echo-button">echo</button>
+ <input id="user-text" />
+ <br />
+ <button id="echo-button">echo</button>
 
-	<hr />
+ <hr />
 
-	<pre id="display-zone"></pre>
+ <pre id="display-zone"></pre>
 </div>
 
 <script>
-	// --- save important DOM elements to variables ---
-	const userTextEl = document.getElementById('user-text');
-	const echoButtonEl = document.getElementById('echo-button');
-	s;
-	const displayZoneEl = document.getElementById('display-zone');
-
-	// --- add event listeners + handlers ---
-	echoButtonEl.addEventListener('click', () => {
-		const userInput = userTextEl.value;
-		console.log(userInput);
-
-		displayZoneEl.innerText = userTextEl.value;
-	});
+ // --- save important DOM elements to variables ---
+ const userTextEl = document.getElementById('user-text');
+ const echoButtonEl = document.getElementById('echo-button');
+ s;
+ const displayZoneEl = document.getElementById('display-zone');
+
+ // --- add event listeners + handlers ---
+ echoButtonEl.addEventListener('click', () => {
+  const userInput = userTextEl.value;
+  console.log(userInput);
+
+  displayZoneEl.innerText = userTextEl.value;
+ });
 </script>
 ```
 
@@ -207,8 +207,8 @@ humans to know the file's purpose:
 
 ```
 /exercise-name
-	/index.html
-	/script.js
-	/script.re.js
-	/styles.css
+ /index.html
+ /script.js
+ /script.re.js
+ /styles.css
 ```
diff --git a/03-control-flow/1-isolate/6-for-loops/README.md b/03-control-flow/1-isolate/6-for-loops/README.md
index 1f899a7..eba0e67 100644
--- a/03-control-flow/1-isolate/6-for-loops/README.md
+++ b/03-control-flow/1-isolate/6-for-loops/README.md
@@ -16,7 +16,7 @@ conventionally used?
 
 ```js
 for (initialization; condition; finalExpression) {
-	// ... loop body ...
+ // ... loop body ...
 }
 ```
 
@@ -37,15 +37,15 @@ The correct answer is `2`:
 
 ```js
 for (
-	// 2: declare and assign the `step` variable
-	let step = 0; // initialization
-	// 3, 6, 9, 12: check if `step` is less than 3
-	step < 3; // condition
-	// 5, 8, 11: add 1 to `step`
-	step++ // finalExpression
+ // 2: declare and assign the `step` variable
+ let step = 0; // initialization
+ // 3, 6, 9, 12: check if `step` is less than 3
+ step < 3; // condition
+ // 5, 8, 11: add 1 to `step`
+ step++ // finalExpression
 ) {
-	// 4, 7, 10: log the current value of `step`
-	console.log(step);
+ // 4, 7, 10: log the current value of `step`
+ console.log(step);
 }
 ```
 
@@ -74,14 +74,14 @@ let max = 3;
 let step = 0;
 // condition
 while (step < max) {
-	console.log(step);
-	// final expression
-	step = step + 1;
+ console.log(step);
+ // final expression
+ step = step + 1;
 }
 
 // initialization; condition; finalExpression
 for (let step = 0; step < max; step++) {
-	console.log(step);
+ console.log(step);
 }
 ```
 
@@ -91,7 +91,7 @@ _variables_ button):
 
 ```js
 for (let step = 0; step < 3; step++) {
-	console.log(step);
+ console.log(step);
 }
 
 step; // ReferenceError
@@ -122,13 +122,13 @@ let totalRepetitions = 4;
 let repeatedString = '';
 
 for (let i = 0; i < totalRepetitions; i++) {
-	repeatedString += toRepeat;
-	console.log('repeatedString:', repeatedString);
+ repeatedString += toRepeat;
+ console.log('repeatedString:', repeatedString);
 }
 
 console.assert(
-	repeatedString === 'howdyhowdyhowdyhowdy',
-	'"howdy" should be repeated 4 times',
+ repeatedString === 'howdyhowdyhowdyhowdy',
+ '"howdy" should be repeated 4 times',
 );
 ```
 
@@ -149,14 +149,14 @@ let reversedString = '';
 console.log('reversedString:', reversedString);
 
 for (_; _; _) {
-	let nextLetter = _;
-	reversedString = _ + _;
-	console.log('reversedString:', reversedString);
+ let nextLetter = _;
+ reversedString = _ + _;
+ console.log('reversedString:', reversedString);
 }
 
 console.assert(
-	reversedString === 'mlkj',
-	'reversed string is the original reversed',
+ reversedString === 'mlkj',
+ 'reversed string is the original reversed',
 );
 ```
 
diff --git a/07-using-functions/README.md b/07-using-functions/README.md
index cc9876c..2a70fc7 100644
--- a/07-using-functions/README.md
+++ b/07-using-functions/README.md
@@ -75,11 +75,11 @@ use functions (remember zooming in and zooming out?):
  * @returns {string} the reversed text
  */
 const reverseString = (text = '') => {
-	let backwards = '';
-	for (const character of text) {
-		backwards = character + backwards;
-	}
-	return backwards;
+ let backwards = '';
+ for (const character of text) {
+  backwards = character + backwards;
+ }
+ return backwards;
 };
 console.assert(reverseString('') === '', 'Test 1');
 console.assert(reverseString('1234') === '4321', 'Test 2');
@@ -92,7 +92,7 @@ console.assert(reverseString('ooo') === 'ooo', 'Test 5');
 // -- gather user input --
 let input = null;
 while (input === null) {
-	input = prompt('enter some text to reverse');
+ input = prompt('enter some text to reverse');
 }
 
 // -- use your program logic --
diff --git a/08-arrays/3-integrate/README.md b/08-arrays/3-integrate/README.md
index 0f20c76..d863fb6 100644
--- a/08-arrays/3-integrate/README.md
+++ b/08-arrays/3-integrate/README.md
@@ -75,11 +75,11 @@ use functions (remember zooming in and zooming out?):
  * @returns {string} the reversed text
  */
 const reverseString = (text = '') => {
-	let backwards = '';
-	for (const character of text) {
-		backwards = character + backwards;
-	}
-	return backwards;
+ let backwards = '';
+ for (const character of text) {
+  backwards = character + backwards;
+ }
+ return backwards;
 };
 console.assert(reverseString('') === '', 'Test 1');
 console.assert(reverseString('1234') === '4321', 'Test 2');
@@ -92,7 +92,7 @@ console.assert(reverseString('ooo') === 'ooo', 'Test 5');
 // -- gather user input --
 let input = null;
 while (input === null) {
-	input = prompt('enter some text to reverse');
+ input = prompt('enter some text to reverse');
 }
 
 // -- use your program logic --
diff --git a/09-functional-array-methods/3-implicit-return/README.md b/09-functional-array-methods/3-implicit-return/README.md
index 35c1ba7..73cc95d 100644
--- a/09-functional-array-methods/3-implicit-return/README.md
+++ b/09-functional-array-methods/3-implicit-return/README.md
@@ -15,7 +15,7 @@ to that.
 // these two functions do exactly the same thing!
 
 const explicitReturn = (a, b) => {
-	return a + b;
+ return a + b;
 };
 
 const implicitReturn = (a, b) => a + b;
diff --git a/lesson-plans/for-loops/README.md b/lesson-plans/for-loops/README.md
index 1f899a7..eba0e67 100644
--- a/lesson-plans/for-loops/README.md
+++ b/lesson-plans/for-loops/README.md
@@ -16,7 +16,7 @@ conventionally used?
 
 ```js
 for (initialization; condition; finalExpression) {
-	// ... loop body ...
+ // ... loop body ...
 }
 ```
 
@@ -37,15 +37,15 @@ The correct answer is `2`:
 
 ```js
 for (
-	// 2: declare and assign the `step` variable
-	let step = 0; // initialization
-	// 3, 6, 9, 12: check if `step` is less than 3
-	step < 3; // condition
-	// 5, 8, 11: add 1 to `step`
-	step++ // finalExpression
+ // 2: declare and assign the `step` variable
+ let step = 0; // initialization
+ // 3, 6, 9, 12: check if `step` is less than 3
+ step < 3; // condition
+ // 5, 8, 11: add 1 to `step`
+ step++ // finalExpression
 ) {
-	// 4, 7, 10: log the current value of `step`
-	console.log(step);
+ // 4, 7, 10: log the current value of `step`
+ console.log(step);
 }
 ```
 
@@ -74,14 +74,14 @@ let max = 3;
 let step = 0;
 // condition
 while (step < max) {
-	console.log(step);
-	// final expression
-	step = step + 1;
+ console.log(step);
+ // final expression
+ step = step + 1;
 }
 
 // initialization; condition; finalExpression
 for (let step = 0; step < max; step++) {
-	console.log(step);
+ console.log(step);
 }
 ```
 
@@ -91,7 +91,7 @@ _variables_ button):
 
 ```js
 for (let step = 0; step < 3; step++) {
-	console.log(step);
+ console.log(step);
 }
 
 step; // ReferenceError
@@ -122,13 +122,13 @@ let totalRepetitions = 4;
 let repeatedString = '';
 
 for (let i = 0; i < totalRepetitions; i++) {
-	repeatedString += toRepeat;
-	console.log('repeatedString:', repeatedString);
+ repeatedString += toRepeat;
+ console.log('repeatedString:', repeatedString);
 }
 
 console.assert(
-	repeatedString === 'howdyhowdyhowdyhowdy',
-	'"howdy" should be repeated 4 times',
+ repeatedString === 'howdyhowdyhowdyhowdy',
+ '"howdy" should be repeated 4 times',
 );
 ```
 
@@ -149,14 +149,14 @@ let reversedString = '';
 console.log('reversedString:', reversedString);
 
 for (_; _; _) {
-	let nextLetter = _;
-	reversedString = _ + _;
-	console.log('reversedString:', reversedString);
+ let nextLetter = _;
+ reversedString = _ + _;
+ console.log('reversedString:', reversedString);
 }
 
 console.assert(
-	reversedString === 'mlkj',
-	'reversed string is the original reversed',
+ reversedString === 'mlkj',
+ 'reversed string is the original reversed',
 );
 ```
 
diff --git a/lib/dom-io/DOCS.md b/lib/dom-io/DOCS.md
index dc2f492..485c200 100644
--- a/lib/dom-io/DOCS.md
+++ b/lib/dom-io/DOCS.md
@@ -52,7 +52,7 @@ When the user change's the form data, the code in your handler will be executed.
 // log the user's favorite number each time they change the input
 
 whenFormDataChanges('user-data', () => {
-	console.log('you just changed the form data!');
+ console.log('you just changed the form data!');
 });
 ```
 
@@ -90,22 +90,22 @@ This function supports these HTML elements:
 ```html
 <!-- all <input>, <fieldset> and <select> must be inside a <form> -->
 <form>
-	<!-- labeled text inputs with an id -->
-	<label>inputs with type "text"<input id="words" type="text" /></label>
-
-	<!-- fieldsets with an id, containing labeled & named radio inputs -->
-	<fieldset id="radio-options">
-		<label>red: <input type="radio" name="color" checked /></label>
-		<label>blue: <input type="radio" name="color" /></label>
-		<!-- ... -->
-	</fieldset>
-
-	<!-- select elements with an id, containing options -->
-	<select id="selection">
-		<option>A</option>
-		<option value="B">b</option>
-		<!-- ... -->
-	</select>
+ <!-- labeled text inputs with an id -->
+ <label>inputs with type "text"<input id="words" type="text" /></label>
+
+ <!-- fieldsets with an id, containing labeled & named radio inputs -->
+ <fieldset id="radio-options">
+  <label>red: <input type="radio" name="color" checked /></label>
+  <label>blue: <input type="radio" name="color" /></label>
+  <!-- ... -->
+ </fieldset>
+
+ <!-- select elements with an id, containing options -->
+ <select id="selection">
+  <option>A</option>
+  <option value="B">b</option>
+  <!-- ... -->
+ </select>
 </form>
 ```
 
@@ -129,8 +129,8 @@ This function supports these HTML elements:
 ```html
 <!-- all <input> must be inside a <form> -->
 <form>
-	<!-- a labeled checkbox input with an id -->
-	<label><input id="cookies" type="checkbox" /> accept all cookies</label>
+ <!-- a labeled checkbox input with an id -->
+ <label><input id="cookies" type="checkbox" /> accept all cookies</label>
 </form>
 ```
 
@@ -154,11 +154,11 @@ This function supports these HTML elements:
 ```html
 <!-- all <input> must be inside a <form> -->
 <form>
-	<!-- a labeled number input with an id -->
-	<label>your age: <input id="age" type="number" /></label>
+ <!-- a labeled number input with an id -->
+ <label>your age: <input id="age" type="number" /></label>
 
-	<!-- a labeled range input with an id -->
-	<label>between 1-100 <input id="one-to-hundred" type="range" /></label>
+ <!-- a labeled range input with an id -->
+ <label>between 1-100 <input id="one-to-hundred" type="range" /></label>
 </form>
 ```
 
diff --git a/package-lock.json b/package-lock.json
index 7b762e3..8e820e0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -6827,20 +6827,6 @@
 				"is-typedarray": "^1.0.0"
 			}
 		},
-		"node_modules/typescript": {
-			"version": "5.0.4",
-			"resolved": "https://registry.npmjs.org/typescript/-/typescript-5.0.4.tgz",
-			"integrity": "sha512-cW9T5W9xY37cc+jfEnaUvX91foxtHkza3Nw3wkoF4sSlKn0MONdkdEndig/qPBWXNkmplh3NzayQzCiHM4/hqw==",
-			"dev": true,
-			"peer": true,
-			"bin": {
-				"tsc": "bin/tsc",
-				"tsserver": "bin/tsserver"
-			},
-			"engines": {
-				"node": ">=12.20"
-			}
-		},
 		"node_modules/uc.micro": {
 			"version": "1.0.6",
 			"resolved": "https://registry.npmjs.org/uc.micro/-/uc.micro-1.0.6.tgz",