Pretests are an extremely effective tool that should be used a lot more often than they are. Pretests help teachers in many ways, not only by helping inform teachers of how much students know before they begin a lesson or unit but also by helping them see how much students actually mastered at the end of a lesson. Further, pretests can help teachers in other ways. Read this article to find out how they can help and what to consider before designing them for your own use.