After studying for two hours, you begin to tire and your ability to concentrate decreases rapidly. To keep up your efficiency, take a break and then switch to studying another subject. Helps you get started. Prevents avoidance of disliked subjects. Helps you monitor the slackening-off process.
Helps eliminate the wrong type of cramming.
Makes studying more enjoyable. Enhances cumulative review. Frees the mind. Controls the study break. Promotes scheduled recreation.