I teach Math at a technical college. I used to give in-class quizzes that covered the material that we had learned that day. I found that many students struggled with this. I changed my format and started giving take-home quizzes to do over the weekend. I like the fact that they have PLENTY of time to do the quiz. My students like this a lot more but there are some problems; 1. I don't know if each student is doing their own work. 2. If someone doesn't do it then I'm not able to go over it in class. I've thought about giving the quiz at the beginning of class when they come back from the weekend but again there is that issue of "time" that scare a lot of students, like if I give them 10 min to complete the quiz. Any suggestions?