Many students review course material at various times during a semester so they will be prepared for the final exam. these students are especially likely to retain the information far into the future. this best illustrates the value of

This best illustrates the value of the spacing effect.

This type of an effect refers to the fact that learning is better if it is extended over a long period of time. So, if you are studying for an exam, it is better to study for a month, where each day you will read a portion of a lesson, rather than pull an all-nighter and cram it all.