The Science Says: Practice Testing Beats Highlighting

Your child sits at the kitchen table with a textbook and a highlighter pen. They run the yellow marker over key sentences. They read the same page three times. It feels like revision. It looks like revision.

It isn't.

The landmark study most parents have never heard of

In 2013, a team of cognitive scientists led by John Dunlosky published the most comprehensive review of learning techniques ever conducted. They evaluated 10 common study methods across hundreds of experiments, thousands of students, and decades of research.

Not moderate. Not "depends on the child." LOW. Across every age group. Every subject. Every context studied.

What actually works

The same review rated two techniques as HIGH utility — effective across all subjects, all ages, all contexts:

• Practice testing (retrieval practice) — actively recalling information from memory, not passively reading it. Flashcards, quizzes, practice questions. The act of pulling the answer out of your head is what strengthens the memory
• Distributed practice (spaced repetition) — spreading study over time rather than cramming. 20 minutes a day beats 3 hours on Sunday. The spacing forces your brain to rebuild the memory each time, making it stronger

The most effective learning technique is the simplest: test yourself. Not read. Not highlight. Not re-read. Test.

Why highlighting feels productive (but isn't)

Highlighting creates the illusion of learning. Your child recognises the highlighted text when they see it again. That recognition feels like knowledge. But recognition is not recall — and the exam requires recall.

It's like the difference between recognising someone's face in a photo and remembering their name without seeing them. SATs don't show your child the highlighted passage. They ask questions about it from memory.

What Rosenshine adds

Barak Rosenshine's Principles of Instruction — the framework every UK teacher is trained on — reinforces the same message:

Notice the pattern: review, practice, test. Not read, highlight, re-read.

How to apply this at home

You don't need to understand the cognitive science. You need to change the format:

• Replace re-reading with quizzing — instead of "read your notes", say "close your book and tell me what you remember"
• Short daily sessions, not weekend marathons — 20 minutes every evening beats 2 hours on Saturday. The spacing is the mechanism, not the volume
• Mix topics — interleaved practice (switching between fractions, time, and measurement in one session) is rated MODERATE utility. Better than doing 30 identical fraction questions in a row
• Use tools designed for retrieval — practice questions, flashcards, adaptive quizzes. Not worksheets that ask children to fill blanks while reading from the same page

The EEF Toolkit confirms this from a different angle: feedback adds +6 months of progress. Practice testing with immediate feedback combines both of the most effective approaches into one activity.