I've seen several people say that teachers think that because kids weren't eager to do "more of the same work" when they were finished that it meant they were getting enough education. Explain the concept of cirriculum compacting, that if a kid can do several of the hardest examples if a problem that you should offer them something with a different concept rather than more of the same. That's not counting review. If it's been awhile since they've seen something you can offer them a few pages for review. But try to change it up a little with some new content. This is where you can move laterrally by giving them trivia factoid content that the class doesn't cover if you don't want them getting ahead of the class.
