For teachers
Hard physics your students can actually see. Try the free sections, then bring your class.
Try it free
The free sections of every lesson are open to anyone. A subscription or classroom seats unlock the rest.
Virtual classrooms
Add students yourself or hand out a join code. Students need no email address. Reset passwords, move or remove students at any time.
Every score in one grid
Rows are students, columns are lessons and quizzes. See who is stuck, then export the grid as CSV.
Teacher accounts open with the classroom release. Until then, anyone can watch the free sections of every lesson without an account.