Interactive, ungraded self-checks that build and confirm your understanding each week.
Self-checks are short, interactive, and ungraded: nothing is submitted and you can retry as often as you like. Each content week has one before class to build the fundamentals and one after class to confirm what you learned, both on that week’s lesson page. Pick an answer for instant feedback and an explanation; math renders automatically, and your progress is saved in your browser only.
The after-class checks are also your exam revision. Both exams draw their questions from these, exactly as written, alongside questions from the weekly take-homes.
Two weeks differ: Week 1’s Monday collects nothing, so its first check opens Wednesday’s session in the room, and Week 16 keeps both checks even though it teaches no new chapter.