The short answer is no. There is only homework. Don't get too excited though. It is a different kind of homework. The homework you are used to is completion based. That just means you finish it and you get all the credit for it. The homework in this class is mastery based. That means you do the homework right. And you are at level 1 with those skills. You will then have to do a question from that homework after waiting 16 hours. If you get it right, you are at level 2. You wait another 16 hours, and you can try again to get to level 3. Once you are at level 4. The skills are mastered and you have full credit. Khan Academy will occasionally bring back that skill to make sure you know it. If you miss it you move back one level to level 3. If you get it right, you stay at level 4. This is to make sure skills stay mastered over the course of the semester.