Blocked Practice Feels Better Than It Works

Practicing one type of problem over and over feels great — you get faster, more confident, and the answers come easily. But that fluency is often an illusion. Blocked practice builds speed within a single pattern, not the ability to choose the right pattern. When problems are mixed — as they always are in real life, on exams, or at work — you suddenly struggle, because you never practiced the hardest part: recognizing which approach to use.

Interleaved practice — mixing different types of problems in the same session — feels harder and messier. Your accuracy drops, and progress feels slower. But that difficulty is exactly what makes it effective. Your brain is forced to discriminate between approaches, not just execute one on autopilot. The discomfort of interleaving is the feeling of building real, transferable skill.