Overlearning
Overlearning means you keep practicing a skill even after you can already do it right, so it turns automatic and holds up when you are stressed or short on time.
Most people stop the second they get something right once. Overlearning is the opposite. You keep going for a few more rounds past that point. Those extra reps are what make the skill stick and turn it into something you can do without thinking.
It works best for things you do step by step, like solving an equation, balancing a chemical reaction, or running a method you will need on an exam. When the steps are automatic, you free up your head for the hard parts of the question instead of burning effort on the basics. It also helps under pressure, when nerves make easy things slip.
One catch: doing the same thing over and over has limits. After a point, extra reps on the same day give you less back. Spacing the practice out over several days beats cramming all the extra reps into one sitting.
Maya can already solve quadratic equations correctly. Instead of stopping, she does five more on Monday and a few more on Wednesday and Friday. By the exam she does them on autopilot, so she can spend her time on the word problems that actually trip her up.