Sara Baerbock

1. Общност
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

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...