Doug Rohrer: 2 ideas worth knowing

2 ideas from Doug Rohrer, each explained in a minute and credited to the original work. Free on Savvy.

Mixing up your practice problems beats grinding one type at a time
Students who practiced math problems in shuffled order scored roughly double the students who drilled one problem type at a time, even though blocked practice felt easier in the mo…
— Kelli Taylor and Doug Rohrer, The Effects of Interleaved Practice
Mixing different types of practice problems works better than blocking them by type
In a 2007 study, Doug Rohrer and Kelly Taylor had students practice math problems either grouped by type, all of one kind before moving to the next, or interleaved, with types mixe…
— Doug Rohrer, Kelly Taylor, The Shuffling of Mathematics Problems Improves Learning

Five ideas worth knowing, every week