Continuing the study or practice after it is well understood is called overlearning. Overlearning can have its place—it can help produce an automaticity that is important when you are executing a serve in tennis or playing a perfect piano concerto. But be wary of repetitive overlearning during a single session in math and science learning—research has shown it can be a waste of valuable learning time.36 (Revisiting the approach mixed with other approaches during a subsequent study session, however, is just fine.)
