How to Study Smarter with Interleaving: Mix Topics for Better Results

A four-panel comic strip showing a student's transformation from bored whilst studying one textbook to confident and accomplished after rotating between three related subjects, illustrating the interleaving study technique.

Ever feel like you're putting in the hours but the information just isn't sticking? You're not alone. Many learners fall into the trap of drilling one topic for hours, only to find it all disappears when they actually need it. The solution? Interleaving—a study technique that involves mixing related topics instead of focusing on just one. This approach trains your brain to make stronger connections and recall information when it truly matters.

Why Focusing on One Topic Can Hold You Back

Working through chapter after chapter of the same material might feel productive, but it often creates an illusion of progress. When you drill one topic repeatedly, your brain gets comfortable. Everything feels familiar and easy. The problem? This comfort doesn't translate to real-world situations where you need to quickly identify which concept to apply and how to use it.

Think of it like practising football drills in the same spot every day. On match day, when the ball comes from an unexpected angle, you're caught off guard. Studying works the same way—if you only ever see information in one context, you'll struggle to recognise and use it in different situations.

Choose Related Topics to Mix

The key to effective interleaving is selecting topics that are related but distinct. Here's how to get started:

  • Pick 2-4 related subjects or skills that naturally overlap—like maths, physics, and chemistry, or different grammar concepts in language learning
  • Ensure they're connected enough that comparing them helps, but different enough to require distinct thinking
  • Start small—you don't need to mix everything at once, just a manageable set

For example, if you're learning to draw, you might rotate between practising shapes, working on shading techniques, and studying perspective. If you're studying for science exams, you could mix questions from different but related topics rather than completing an entire chemistry chapter before moving to physics.

Rotate Your Focus Between Subjects

Once you've chosen your topics, it's time to shuffle them into your study sessions. Create short cycles where you move between your chosen subjects. Work on one topic for 15-20 minutes, then switch to the next. After you've cycled through all your topics once, take a brief break, then repeat.

This won't feel as smooth as traditional studying—and that's exactly the point. The slight difficulty you experience when switching contexts is called 'desirable difficulty'. It's actually a signal that your brain is working harder and forming stronger, more flexible connections. You're training your mind to actively compare, contrast, and choose the right approach for each situation.

Build Stronger Connections Through Interleaving

As you continue rotating between topics, something remarkable happens. Your brain starts noticing patterns and differences more clearly. You become better at distinguishing between similar concepts and knowing exactly when to apply each one. This is the kind of understanding that actually shows up when you need it—in exams, at work, or in everyday problem-solving.

Keep an eye on which areas feel weaker and give them a bit more attention in your next cycle. The beauty of interleaving is that it naturally highlights your weak spots while reinforcing everything else.

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