By giving my students daily quiz's, I am evaluating how they are doing and where each student is in the learning process. I have found that this is very helpful in my teaching process as well. I also give my students back their quiz's/exams the very next class period and go through them as a class. I have made errors in the past and this is the best solution to giving my students the most available points possible. I have also found that giving my students who have missed my exam another version is a little trickier on the students. They feel they can talk to their classmates and get a good feeling for the quiz/exam. I don't find that is fair to my other students who were present for the exam, so I do give a different version to that student that had missed class.