Learn from the mistakes you keep making

• It watches the code you actually write

  Logic mistakes get underlined as you type — off-by-one loops, conditions that assign instead of compare.

• Lessons for your mistake, not the topic

  Repeat something and you get a short lesson written around the exact code you wrote.

• Practice that meets you where you are

  Short games that get harder as you get better, and easier when you are stuck.

• Pair up when you are stuck

  Drive or navigate through a problem with someone else, in a shared editor.