Sometimes when I use photos for class books, I print and cut them, and then glue them to both sides of construction paper. It saves paper and creates books that are less bulky. Then I use packing tape down the edge that will be bound. I fold it over the edge to cover both sides at once.
(Obviously this book isn't bound yet.)
I try to mix up the look of my books in size, shape, color, and the way they're made. For example, the book above is actually quite small. If you'd like to see another way I make books, look here. I hope this inspires you to make a classroom book or two (or several).