This interactive book is one of many at Collège Marc Chagall‘s site. They are great, offering interesting vocabulary, grammar explanations, some written and oral practicing and oral comprehension.
This one, in particular, is designed to practice the comparative adjectives and learn some vocabulary (adjectives, in this case) related to them.
I specially liked the final part, where students are given a bunch of personality adjectives in order to compare girls and boys. They really enjoyed that part!
I found it really useful. Hope you do, too!