(Answered) Do I need to work on 1 course throughout the bts challenge or can I do several?

Answer 1

No you don't need to be involved in only one course. You cal finish lesson of different courses even of those which you finished already.

Answer 2

You can complete as many lessons as you want but be sure to complete at least one lesson per day to continue your streak

Answer 3

I did different courses each day and I'm on day 16 with nothing