How to study for a test

When you reread a page, the words start to look familiar. Your brain reads that feeling as “I know this.” But recognizing something when it is in front of you is not the same as pulling it out of your memory when the page is gone. On a test, the page is gone.

Highlighting has the same problem. Picking which line to color takes very little thinking, and a page full of yellow tells you nothing about what you can actually remember. Rereading and highlighting are fine for a first pass through new material. They just should not be the whole plan.

Active recall means testing yourself: you close the book and try to bring the answer back from memory. It is one of the most strongly supported study methods there is. Each time you pull a fact out of memory, it gets easier to pull out the next time. Trying and failing helps too, as long as you check the right answer right after.

• Cover your notes and write down everything you remember about a topic. Then uncover them and fill in what you missed in a different color.
• Turn each heading in your notes into a question and answer it out loud before you read the section.
• Use flashcards, and say the answer before you flip the card.
• Explain a topic to a friend, a family member or an empty room, without looking.

Studying for three hours the night before is called cramming. Spreading those same three hours over several days is called spaced practice, and it leads to memories that last much longer. Cramming can get you through a quiz the next morning, but most of it fades within days, which hurts on finals and on later units that build on it.

Spacing works because a little forgetting between sessions makes your brain work harder to bring things back, and that effort is what makes them stick. A good rule is to come back to a topic one day later, then a few days later, then again before the test.

A practice test is active recall in the exact shape of the real thing. It shows you what you know, what you only think you know, and how long questions really take. Take it like the real test: no notes, a timer if the real one is timed, and your phone in another room.

1. Find or make questions like the ones your teacher asks: old quizzes, review sheets, textbook section reviews or a practice test you build from your notes.
2. Do them all before checking any answers.
3. Mark each one: right, wrong, or right but guessed.
4. Spend most of your remaining study time on the wrong and guessed ones.
5. A day or two later, try those same questions again without looking at your fixes.

Homework often gives you twenty problems of the same kind in a row. By problem three you are not choosing a method anymore, you are just repeating the last one. A test mixes everything together, so part of the challenge is knowing which method a question needs.

Mixing topics while you practice, also called interleaving, trains that skill. Instead of ten problems from section 4.1 and then ten from 4.2, shuffle them. It feels harder and slower, and that is the point. Research on math practice in particular shows that mixed practice leads to better test scores than blocked practice, even though blocked practice feels easier at the time.

You do not need hours a day. Short sessions spread over the week beat one long session. Here is a plan for a test seven days away. Move the days around to fit your schedule.

The night before is for a short review, not for learning new material. Go through the cards and questions you struggled with, pack what you need, and go to bed at a normal time.

Sleep matters more than one more hour of studying. While you sleep, your brain sorts and stores what you learned during the day. Staying up late to cram leaves you tired, slower and more likely to blank on things you actually know.

• Eat something in the morning, even if it is small.
• Look over a short list of key facts or formulas, then put it away.
• On the test, skim every question first and start with the ones you are sure of.
• If you blank on a question, mark it and move on. It often comes back later.

• Studying only the parts you already like or already know.
• Copying notes over neatly instead of testing yourself on them.
• Looking at the answer too soon. Give yourself a real try first.
• Studying with your phone buzzing next to you. Even quick checks break your focus.
• Waiting until you “feel ready.” Feeling ready comes from practice, not before it.