Learning how to learn

Why this matters

STEM fields change constantly. New tools, standards, code editions and programming languages appear every year, so the most valuable long-term skill is knowing how to learn efficiently. Learning research gives clear, practical advice, and much of it goes against what people do naturally. Re-reading notes and highlighting feel productive but work poorly. A few simple changes to how you study can make the same hours count for much more.

How memory works, briefly

When you learn something new, it starts out fragile. Each time you successfully recall it, especially after some time has passed, the memory gets stronger and lasts longer. When you never revisit it, it fades: this is often called the forgetting curveThe way a new memory fades over time when you never revisit it.. Two ideas follow:

• Recall strengthens memory more than review. Pulling information out of your head works better than putting it in again.
• Spacing beats cramming. Several short sessions spread over days beat one long session, even when the total time is the same.

Four techniques that work

1. Retrieval practiceTesting yourself by recalling information from memory, which strengthens it more than re-reading. (test yourself). Close the book and try to answer a question, write down what you remember, or explain the idea out loud. Quizzes in this course are retrieval practice. Getting things wrong is part of the process: the effort of trying is what builds memory.

2. Spaced repetitionReviewing material at growing intervals, such as 1 day, 3 days, 1 week, 2 weeks and 1 month after learning it.. Review material at increasing intervals: for example 1 day, 3 days, 1 week, 2 weeks, 1 month after you first learn it. Flashcard apps such as Anki (free) do the scheduling for you, but a paper notebook with dates works too.

3. InterleavingMixing different types of problems in one session so you practise choosing the right method each time.. Mix different types of problems in one session instead of doing 20 of the same kind in a row. Mixing percent problems, unit conversions and rates forces you to choose the right method each time, which is the skill you need at work.

4. Focused and diffuse modes. Work in short, focused blocks (for example 25 minutes with no phone, then a 5-minute break, known as the Pomodoro techniqueWorking in short focused blocks, such as 25 minutes with no phone, each followed by a short break.). Breaks, walks and sleep are not wasted: your brain keeps processing in the background. Sleep in particular is when much of the day's learning is consolidated.

Worked example: a weekly plan

Sam works full time and wants to study about 5 hours a week. Instead of one 5-hour Saturday session, Sam plans:

Every topic is recalled several times over the week, problem types are mixed, and there is built-in rest. The total time is the same as one long session, but Sam will remember far more a month later.

Avoiding the illusion of competence

Some study habits feel good but do not lead to learning:

• Re-reading feels fluent because the text is familiar, not because you can use it.
• Highlighting everything means nothing stands out.
• Watching a video and nodding along is not the same as being able to do the task.

A simple test: close everything and try to solve a problem or explain the idea from scratch. If you cannot, you are not there yet, and that is fine. Now you know what to practise.

Staying motivated

• Set process goals ("study 45 minutes on Monday, Tuesday and Thursday") rather than only outcome goals ("pass the exam").
• Make it easy to start: keep materials ready, and start with just five minutes when you do not feel like it.
• Track progress: your portfolio log and the course progress page show how far you have come.
• Learn with others: forums, study groups and explaining to a friend all add retrieval practice.

Common mistakes

• Cramming the night before and forgetting it all a week later.
• Only re-reading instead of testing yourself.
• Avoiding hard problems because getting things wrong feels bad.
• Skipping sleep to study more, which undoes much of the learning.
• Plans that are too ambitious to keep up. A smaller plan you follow beats a big one you abandon.

Quick recap

• Recall strengthens memory; test yourself instead of re-reading.
• Space your practice and review at growing intervals.
• Mix problem types (interleaving).
• Work in focused blocks with real breaks, and protect your sleep.
• Plan a realistic weekly routine and track it.

Try it

Open the Do tab. You will build your own weekly study plan for the next course on your path, with spaced reviews and retrieval practice built in.