This product is a set of 100 Grammar Challenges with answer keys and optional hints. I consider it my best product, and I don't think you'll be disappointed. Whether you're teaching English, ESL, Special Ed. or related subject, you'll never have to worry about a bell ringer or exit slip again.
***UPDATE***
I have broken this activity up into three folders: answer keys, with hints, and no hints. I leave it up to you to determine what will work best for your class. Personally, I like to start my