> 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.

Homework was required and graded, so I assume everybody did it! It also forced you to attend every lecture because you had to hand in homework on the way in. The professor claimed he would throw away homework from those who dropped it off and walked out. (In reality, with prior communication he was always flexible. )