I will have to try to find my Chapter 2 post. It is probably on another blog where it does not belong!
Chapter 3 is about interleaving- learning part of a topic and then revisiting to learn more, or periodically reviewing a topic. Simple ways to achieve this are to adjust how you cover learning blocks so that half is in each of two classes, or so that assessments are cumulative over a course.
Cumulative assessments left me wondering if some topics would be over emphasized and others under emphasized by the assessment system, but Lang acknowledges this and suggests only using a small portion of each assessment for the review questions, or using only a fraction of the assessments for review if each has only a couple questions.
This certainly shows that review sheets and mixed reviews mid-chapter in a math course are worthwhile tasks.