Having students write compositions, essays, and summaries of what they have learned forces them to assimilate the new information. Application is another form of review,perhaps the ultimate form of review. Let us say, for example, that you teach a Bible lesson on charity and doing good as a volunteer, focusing on the needs of the elderly. The lesson could end with a ministry visit to a nursing home. Most students will never forget what they learned in such a unit.
Homework is also an excellent review.
Rather than give students busy work for homework, teachers should carefully assign work related to what has been taught in class. Every night, I would transfer the information from my notebook onto index cards. The copying itself was a form of review. By test time, I would have about 60 or 70 cards that I could flip through and review. I would overlearn the material and then isolate the cards with more difficult concepts or with which I was having trouble memorizing.