Code Wars Style

From Piazza:

Actions Suggestion for Source Academy auto-grader www.codewars.com has a very nifty TDD environment for learning and grading.

Question are designed by members of a certain ranking and approved by other ranked members.

And for each question, student can see the author, the number of completions and the sample tests. While there's another set of hidden random tests where only if all random tests are successful are deemed completed with full marks.

And if you have a profile over there, once completed a 'kata', you can actually compare your own solutions against others, thumbs up & comment on solutions of others. While reviewing who else have a similar answer with you.

There's also a discourse section where the lost can ask for help and hints. Of course there's also a functionality to flag a comment as spoiler.