You spend 3 hours highlighting your textbook in neon yellow. The pages look beautiful. You feel productive. Are you learning?

Highlighting is "Low Utility."

Research ranks highlighting as one of the least effective study techniques. It requires almost no mental effort.

🔊

Highlighting is distinct from learning.

The Insight: Mechanical action (moving a pen) != Mental action (connecting neurons).

The Fix: Put the pen down. Read a paragraph. Look away. Summarize it in your own words. That is learning.

The color doesn't matter. The lack of cognitive struggle determines the lack of learning.