- hello gives you a feel of how to use these tests and you will write your first class. See hello/index.md for detailed instructions.
- temperature Write another class and do some basic math.
- calculator introduces a little more math, and you'll need to iterate.
- Pig Latin lets you manipulate strings.
- in_words Ask a number to say itself in English. Extend a built-in class. By the end you'll use conditionals, arrays, iteration, and maybe even some recursion.
- blocks introduces block syntax.