Sara Baerbock

I'm wondering if you meant the Course Challenge making Units/Skills mastered?  I see you have 100% on that, though your specific skills in each Unit are not completely Mastered.  For my students, i...

1. Community
2. General Khan Academy Questions
3. How far do you have to get in a skill (Proficient Familiar Attempted Not started etc) To be able to Master it with a mastery challenge