Multiple Insert to table

I have developed a training registration web app. I am tryiing to add attendance tracking to it. The problem I have is when the trainer selects the class, they get a listing (detail page) of all the students who have registered. I added a field called (attended - yes \ no) to my table and add a check box to the listing. When I submit the form, all the students update 1 record.

How do I do submit multiplte records to the database. I saw something that showed how to update multiplte table (with 1 record) utlizing commands, but I have not used this function yet.