I plan on taking these courses, I was curious on how you found these courses in terms of difficulty and workload? Oh btw Econ is thought by khan and Bio is thought by Dej/Zhu. Thanks!

I took Econ 2J with Khan last summer. it's a fairly easy course, as long as you go to class. He has a quiz once a week usually, you can work with your classmates. His courseware is key for this course, it covers everything you need to know as well as past exams and quizzes to learn from. It is also important you do all the questions in the CCW or as much as possible as a lot of questions are repeated.