Good examples and pro tips

Examples

Simple

Text-only

• http://www.khanacademy.org/exercises?exid=greatest_common_divisor
• http://www.khanacademy.org/exercises?exid=converting_repeating_decimals_to_fractions_1
• http://www.khanacademy.org/exercises?exid=age_word_problems

Graphie for geometric shapes

• http://www.khanacademy.org/exercises?exid=parallel_lines_1
• http://www.khanacademy.org/exercises?exid=solid_geometry

Detailed hints

• http://www.khanacademy.org/exercises?exid=multiplication_4
• http://www.khanacademy.org/exercises?exid=distributive_property

Exploratory + interactive + graphie to plot functions

• http://www.khanacademy.org/exercises?exid=unit_circle
• http://www.khanacademy.org/exercises?exid=derivative_intuition

Different

• http://www.khanacademy.org/exercises?exid=telling_time
• http://www.khanacademy.org/exercises?exid=fractions_cut_and_copy_1

Useful tips

• You can append ?debug to the end of the exercise URL (ex: addition_1.html?debug) to see the values of the variables used in the problem. In this special debug mode, you can type "h" to reveal the next hint.

• Sometimes you'll make changes to the code that aren't reflected when you open the exercise in your browser. Try emptying the cache!

• The word-problems module has a plural function so you don't have to do <var>NUM</var> banana<span data-if="NUM !== 1">s</span> everywhere.

• There are quite a few answer types, with specificity for simplified vs unsimplified fractions, dollar amounts, regex, etc.