Portal for test questions?

I am trying to create a database to keep track of answers to test questions for many students organized into classes. The tests have different numbers of questions, ranging from about 5 to 20, so I need to be able to add tests as I go along, or change the number of questions. I would like a layout on which I would see a list of students in a class and check boxes for each question on a particular test. The checkboxes are because I only need to keep track of whether a particular student got a particular question right or wrong, so they will be set to a value list with a choice of 1. This way I can analyze student scores and test questions based on different classes, grade levels, etc. I was able to set up the adding different tests part, but I can't figure out a way to have the answer checkboxes for each student show horizontally in a portal. I also thought a repeating field would work well, but I can't figure out how to show a certain number of repetitions based on a calculation or another field. Anyone have ideas. Your time and thought is much appreciated.