Retrieval practice on the curriculum's own material. Answer before you reveal — the guessing is
what does the work, not the reading.
Why cards and not re-reading: Roediger & Karpicke found students who re-tested recalled
61% of a passage after a week, versus 40% for students who
re-read it the same number of times — even though the re-readers felt more confident
(Test-Enhanced Learning,
Psychological Science, 2006). Confidence is not retention.