Forums Our Archives Step 5: Activate Repetitions?

I have two specific questions: In other study technique books, they are emphasizing that how important it´s with repetitions. But
in the PR-book, it´s no paragraphs about repititions. Does it means that we don´t need repeat or instead we are using activations?

Why do the brain need incubation time at 24h? According to study technique books we´re forgetting 90% of contents after
24 h that we have read (or study) a book
or other materials.

Jonas