> My question would be- did you have a good sense of how many of your peers did in fact do the homework ahead of class- my instinctual fear is that due to this ‘different approach’ many students may not be bothered to do this?

I took part in an online course where you had to answer 3/5 quick questions correctly before you were admitted to the lecture room.

I think it resulted in an engaged and knowledgeable class.

I've also taken a course where you can't proceed to the next lecture unless you get more than 70% grade on homework from the previous lecture (which you could submit multiple times but it was not multiple choice). This also worked really well.