This is a great worksheet to teach similies! Worksheets are a great idea but computer paper can get very pricey especially if you have 20 students or lots of classes! Also the time to make lots of copies would be a downside.
Reading chains: Every time a student finishes a book, they can write their name, title and author of the book on a strip and attach it to their class chain. Perhaps the class with the longest chain at the end of the year could get some type of reward.