I'm sorry I can't help you with a recipe but if you've read any of my post, you know that I get most of my breakfast (if any at all) at a McDonald's drive thru.
I am sure if you don't have to have a Homemade dish, McDonalds can provide you with enough biscuits for your class.
McDonalds really does have a menu with a variety of good breakfast sandwiches and a breakfast platter too. Heck, the pancakes are cheap enough you could feed your class those. Check out this link to see what all you can feed your class, and your family.