Which grade are you in?
We’ll start every station at the level a typical student in your grade can handle, and open the topics you’ve likely covered. Your first few answers fine-tune it quickly, so don’t worry about picking exactly right.
Grade 10 placement
Learn physics by launching, pushing and crashing things.
Read a short lesson, then practise with problems generated fresh for you. Difficulty follows your skill at every station. Every answer comes with a worked solution and a simulation, and the problems you miss come back later for review.
Stations
Badges
How difficulty adapts
Each station keeps a skill rating from 1 to 10. Problems are pitched close to it, aiming for about 7 right out of 10, which is where people learn fastest.
Beating a hard problem raises your rating a lot; missing an easy one lowers it. Two misses in a row bring an easier problem, and three correct answers in a row bring a stretch problem.
Missed problems go into your review queue. Get one right later and it leaves the queue. Using a hint caps that problem's credit at 60%.