How we rate the evidence

Not every study method has the same research behind it. Each guide carries one of three labels.

Strong evidence

Supported by many studies, in different groups and settings, with fairly consistent results.

Guides with this label:

• Active Recall: Study by Pulling Information Out of Memory
• Flashcards That Work: Make and Use Them Well
• Blank-Page Recall: Write Everything You Remember
• Self-Quizzing: Write Your Own Practice Questions
• Spaced Repetition: Review Over Days, Not All at Once
• A Spacing Schedule for the Whole Semester
• Practice Testing for Exams: Rehearse the Real Thing
• Why Cramming Falls Short and What to Do Instead

Moderate or mixed evidence

Some good research supports it, but results vary or depend on the situation.

Guides with this label:

• The Feynman Technique: Learn by Explaining Simply
• Interleaving: Mix Problem Types While You Practice
• Elaborative Interrogation: Ask Why Questions
• Retrieval Practice for Math: Solve Without Peeking
• Spaced Repetition Apps: Let Software Schedule Reviews
• The Leitner Box System: Paper Spaced Repetition
• Outline Notes: Organize Ideas in Levels
• Concept Mapping: Draw How Ideas Connect
• Reviewing Your Notes So They Actually Help
• Previewing Before You Read: A Two-Minute Map
• Summarizing After Reading: Say It Short in Your Words
• Mnemonics Basics: Memory Tricks for Lists and Facts
• Chunking: Group Information So You Can Hold More
• The Method of Loci: Build a Memory Palace
• Sleep and Memory: Why Rest Matters for Studying
• The Keyword Method: Link New Words to Sounds and Images
• Beating Procrastination: Start Study Tasks Sooner
• Estimating Study Time: Plan Tasks More Realistically
• Set a Clear Study Goal You Can Actually Finish
• Managing Phone Distractions While You Study
• Breaks and Rest: How to Pause So You Can Keep Learning
• The Multitasking Myth: Why Single-Tasking Works Better

Limited evidence

Popular, but with little or inconsistent research support. Treat as an experiment, not a proven method.

Guides with this label:

• Rereading and Highlighting: Popular but Weak Methods
• Learning Styles: What the Research Says
• Cornell Notes: A Page Built for Review
• Handwriting vs. Typing Notes: What the Research Shows
• The SQ3R Method: Survey, Question, Read, Recite, Review
• Annotating While Reading: Write Back to the Text
• Speed Reading Claims: What Research Says About Fast Reading
• Time Blocking for Students: Give Study Tasks a Slot
• Prioritizing Study Tasks: Decide What to Do First
• Exam Countdown Plan: Work Backward From Test Day
• Error Log Method: Turn Mistakes Into a Study List
• Test Day Habits: Sleep, Timing and a Calm Start
• Weekly Study Plan: Build a Week You Can Follow
• Weekly Review Habit: A 20-Minute Check-In
• Semester Study Roadmap: Plan the Whole Term
• The Pomodoro Technique: Study in Short Timed Sprints
• Study Environment: Set Up a Space That Supports Focus

How we decide

1. We look for reviews and meta-analyses in educational and cognitive psychology, and for the original studies behind them.
2. We check whether results hold across different students, subjects and settings, not only in one lab task.
3. We note who was studied. Results from college students may not apply to young children, and the reverse is also true.
4. We separate "the method works in a study" from "the method will work for you." A good average result does not guarantee a good personal result.
5. When research is thin, mixed or missing, we say so and use the limited label, even if the method is very popular.

Why "limited" does not mean "useless"

A limited label means we cannot point to solid research. Some of these methods may still help certain students, often because they get them to start or to review. If you use one, treat it as an experiment: try it for a couple of weeks and check whether you remember more.

Things to keep in mind

• Research changes. We review guides and update them when new work changes the picture. See the Editorial Policy.
• Labels are our summary of the research, not a score from an outside body.
• No label guarantees results. Study habits, sleep, the quality of teaching and many other things also matter.

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