I have never seen any class that teacher would ask students to do their homework during the class time. Why should a MA instructor ask his students to do push up during the MA class time?
When I was young, I joined in a YMCA Karate class once. The Karate instructor wanted us to do push up, sit up, running around the room. One day I asked that Karate instructor, "I come here to learn. I can do all of those at home by myself." He then told me that not everybody would do those at home.
Even today, I still think he was wrong, and I was right. I strongly believe one should go to school to learn and come home to train. But some people may believe that they should go to school to learn/train and come home to rest.