Everything a coding class needs.
Write a test, let students code in the browser, and read what each one can do, skill by skill. Between tests, students keep practising, for free.
One platform, from the first problem to the next lesson.
Each part works on its own and feeds the others: tests feed Progress, Progress suggests practice, practice keeps students coding until the next test.
Code tests
Auto-graded coding exams with public and hidden test cases.Learn moreQuizzes
Five question types, AI drafts, and AI grading you can override.Learn moreProgress
A level per skill for every learner, built from test results.Learn morePractice
About 945 code challenges, a daily challenge, streaks and a leaderboard.Learn moreFair testing
Sandboxed code, hidden cases, blocked paste, recorded tab switches and similar code side by side.Learn moreClass display
A live leaderboard for the projector, ending on a podium.Learn moreFor students
Free tests and practice: challenges, streaks, a leaderboard and quizzes.Learn more