Found 1 comment on HN
Alex3917 · 2019-05-12 · Original thread
Not sure if you saw the book I linked to in my other comment, but that's the premise:

"This book compares how traditional schools can, metaphorically, act like a ski school, which temporarily organizes its students into classes where each student shares a specific and common instructional need but has previously mastered the critical prerequisites that will enable new learning to take place."

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