Some choice nuggets from “How to Learn Better at Any Age” by writer Peter Brown and cognitive psychologists Henry Roediger and Mark McDaniel:
Retrieval practice — recalling facts or concepts from memory — is a more effective learning strategy than review by rereading.
[Interleaved practice] produces longer-lasting learning and enables more versatile application of it in later settings.
Trying to solve a problem before being taught the solution leads to better learning, even when errors are made in the attempt.
You learn better [by] drawing on all of your aptitudes and resourcefulness, than when you limit instruction or experience to the style you find most amenable.
Better yet, write your own summary.