Each item of information is set with a unique pattern of repetition. With SuperMemo, you waste no time on repeating material you remember well. The method aims at allowing the learners to reach their required level of knowledge retention with a minimum amount of repetition and time spent on revisions. By changing the required level of retention the learners can make the system plan their learning schedule more or less intensively. The system sets repetition in daily intervals and requires systematic use for optimum results.