Students who finish their tests early should use the remaining time to proof their answers. Information in one test question may be helpful in answering a different question on the same test. The correct response to any objective test question could help ferret out the answer to a harder question. For this reason, taking a test can be a learning experience in itself. Test taking is a skill.
Skills improve as knowledge is gained and as lessons are learned from mistakes.
Correcting test errors is an excellent example of how a student can learn from mistakes. First, the incorrect answer is replaced with the correct answer. This will help prevent the same mistake from being repeated on a future test. Second, students can identify their mistake patterns, areas where the same mistakes are made over and over. Reviewing and studying graded tests, projects, and homework papers are learning exercises that reinforce teaching.