Highlighting, underlining, rereading, and mnemonic devices have actually been found to be largely ineffective. The ever-popular strategy of highlighting may even get in students’ ways, leading them to emphasize individual facts rather than make connections between concepts.Psychologists have found that the best time interval between two study sessions is 10% of the time between the final test and the second study session. So, to remember something for a year, you should review it about a month after you study it for the first time.We learn by making associations between the things we’re learning and our environments, and varying our surroundings creates more of these associations. Studies repeatedly show that students who study the same material in two different rooms test better than those who stick to the same location.Physical practice is the best way to learn, but research shows that simply watching others perform a motor activity activates brain processes that mimic learning through physical practice. Observation therefore speeds up the learning process.