Introduction

While learning, you make judgments about the learning itself. You decide that a paragraph makes sense, notice that a step is unclear, or choose to practice one topic before another.
Metacognition means knowledge and regulation of your own thinking. Two useful parts are monitoring and control. Monitoring concerns judging what you understand or how you are performing. Control concerns choosing what to do in response.
These abilities help you direct effort where it is useful. They are imperfect, however, because feelings of understanding and direct performance do not always agree. A good method combines self-observation with checks that can reveal a mistake.