How to Tell If You're Overusing Highlighting in Math Study (And What to Do Instead)

Highlighting is quick. It makes you feel like you’re doing something active, and it’s a habit encouraged in many school subjects. But math isn’t always about remembering facts or definitions — it’s about relationships, reasoning, and process. When you highlight a formula or a boxed answer, you’re only flagging the surface. You’re not automatically building the connections you need to actually solve problems on your own.

A common trap: You highlight every formula, example, and explanation, thinking you’ll review them later. But when it’s time to apply the ideas, you can’t recall how or when to use them. The colors haven’t built the understanding you need.

Not sure if highlighting is holding you back? Watch for these:

• You highlight so much that nothing stands out — most pages are more colored than plain.
• You can’t explain why a highlighted step or formula is important, or when to use it.
• When you try a problem, you keep flipping back to highlighted sections instead of reasoning it out.
• You feel more confident while reviewing your colors than when actually solving problems from scratch.

If any of these sound familiar, your highlighting habit may be masking gaps in your understanding.

Unlike subjects where you’re tested on recalling facts (like history or biology), math requires you to generate steps and make decisions. Highlighting tells you what’s important, but not how to use it. The mental effort needed to solve a problem — figuring out which formula applies, what the question is really asking, or why a step works — isn’t triggered when you simply review highlighted notes.

Two key issues:

1. Passive Review: Highlighting is a form of rereading. Research shows that passive review (reading or rereading) leads to quick forgetting, especially in math, where skills matter more than facts.
2. Surface Familiarity: You recognize the formula because it’s highlighted, but you haven’t practiced recalling or using it. This makes you feel prepared, but that feeling often disappears under test pressure.

If you’re ready to make your study time more effective, try these approaches:

1. Practice Active Recall — Without the Colors

Instead of highlighting, close your notes and try to write out a key formula or definition from memory. If you can’t, look it up, then try again. Next, write an example problem and solve it using that formula, step by step, without peeking. This forces your brain to do the work you’ll need on a test.

Why it works: Active recall is proven to strengthen memory and understanding, especially for processes and problem-solving. It’s uncomfortable at first, but it highlights what you don’t know — which is exactly what you need to work on.

2. Annotate Instead of Highlighting

If you’re going to mark up your notes, use the margins for questions, comments, or connections. For example, next to a formula, write: “Only works for right triangles” or “Used when integrating by parts.” Next to a tricky step, jot a reminder: “Why is this negative?” or “Try graphing to check.”

What’s different: Annotation forces you to process the information, not just flag it. You’re making the material your own and noticing where you need more practice.

Here’s a simple way to check if your highlighting is helping:

1. Pick a highlighted formula or method.
2. Cover the page and try to write it — and explain when you’d use it — from memory.
3. Then, solve a new problem that requires it, without looking at your notes.

If you struggle, the colors weren’t enough. This isn’t a sign of failure; it’s a sign that you need more active practice, not more highlighting.

Highlighting isn’t useless — but it needs to be used carefully. Here’s when it can help:

• Flagging truly rare facts: For example, a definition you always forget, or a trick that only comes up once per course.
• Marking mistakes you’ve made before: Highlight your own errors in past work as a warning.

But even then, highlighting should be a small part of your toolkit. If you find yourself reaching for the highlighter every time you open your notes, pause and ask: Am I trying to memorize, or to understand?

It’s easy to think that highlighting will help you “see” what’s important. But in math, the real skill is knowing what to do when you aren’t given hints. Exams rarely say, “Use this formula now.” If you’ve only trained your brain to spot colors, not to reason from scratch, you’ll freeze when the hints aren’t there.

Another issue: Highlighting can make your notes visually overwhelming. If everything is marked, nothing stands out — and your eyes glaze over. Instead, keep your pages as clear as possible, and focus on adding brief written notes that force you to think.

Pick one page of math notes or textbook material you’ve already highlighted. Instead of rereading it, cover it up and:

• Write down (from memory) the top three formulas or concepts from that page.
• For each, create a new example problem and solve it, explaining your reasoning aloud or in writing.
• If you get stuck, go back and find the missing step — then try again, without looking.

This is slower than highlighting, but it’s much more effective for math. You’ll quickly notice which ideas are solid and which need more work.

You don’t need expensive pens or a rainbow of highlighters to succeed in math. The real progress comes from thinking, practicing, and testing your understanding — even if it feels awkward at first. If you want extra support, Learn4Less can help, but you’re fully capable of making these changes on your own.

Highlight less, think more, and watch your confidence grow.