Guide · Study science

Spaced retrieval that actually sticks

A 2024 STEM classroom meta-analysis found spaced quizzes beat cramming. Use this 7-day plan and run each recall block inside Study Spaces.

Start today’s recall block Solo 25 / 5 in Zen Find a recall partner

Finding

Pooled spacing effect across 9 STEM courses

A 2024 classroom meta-analysis found a spacing benefit across nine STEM courses; gains were strongest in calculus and chemistry.

Finding

Low-cost, repeatable

Spaced retrieval improved test scores without extra class time, so it ports easily to self-study blocks.

Finding

Desirable difficulty

Spacing feels harder during practice but delivers better long-term retention than cramming, especially for problem-solving courses.

7-day loop

Copy this weekly plan

Day 1 · Preview + first recall

Read/skim once, then 10–15 recall questions. Run a 25/5 in your Zen room.

Day 2 · Short recall + feedback

Another 10–15 questions, check answers, tag gaps. Use a 20-minute block.

Day 3 · Mix old + new

Blend Day 1 + Day 2 material; 15–20 questions. Run a 25/5 with a friend in the Wave room.

Day 4 · Application set

Do 5 harder problems. Finish with 5 quick recall items. Use a 50/10 if energy is high.

Day 5 · Cumulative quiz

20–25 mixed questions; note weak topics. Host a small room (3–5 ppl) for accountability.

Day 6 · Targeted repair

Re-study only the misses; 10–15 retrievals on those. Keep blocks short (20–25 min).

Day 7 · Mock test

Timed mini-exam; log misses; schedule next week’s spacing. Run a 50/10 then a 10-minute review.

Run it in Study Spaces

Set the timer to 20–30 minutes; keep recall sessions short and repeat across days.
Use the intent input to list questions you’ll cover; mark misses in chat to review on Day 6.
Invite 1–3 partners; small rooms (3–5 ppl) match the accountability effect from the coworking studies.

FAQ

Does spacing always help?

The 2024 multi-course study showed a significant pooled benefit, strongest in calculus and chemistry; other courses saw small or uncertain gains. Spacing is low-risk and often helps retention, so it’s worth adopting.

How many questions per session?

10–25 retrievals per block is a good range. Keep sessions short and repeat across days instead of cramming.

What if I feel slower during spaced practice?

That “desirable difficulty” is expected. Performance during practice may dip, but exam retention improves when practice is spaced.