Good idea, Carolyn! your idea could be adapted to fit a variety of classes; it reminds me of a similar thing I used and really benefited from. When I found myself often reminding students to complete their daily individual Bible Memory practice before asking for free time, I knew there had to be a way to minimize the regulation. It was easily solved by assigning a number to each student and then making as many short lines on the board as there were students. As they completed that practice, they would write their number onto the correct line. Here too at a glance I could see which number/student had not yet completed that requirement.