Estimate retention, forgetting risk, review interval, and required review sessions before an exam using a simple spaced repetition model.
The result shows how much knowledge may remain by the exam and whether additional reviews are needed.
This is a planning model, not a guarantee. Use self-testing to update mastery after each review.
With 20 topics, 70% mastery, difficulty 3, and 21 days until exam, retention may fall without additional review sessions.
Review frequency should increase for difficult topics, low mastery, and exams that are close.
A common pattern is 1 day, 3 days, 7 days, 14 days, and 30 days, adjusted by difficulty.
The calculator estimates sessions needed to reach a healthier retention level before the exam.
Use active recall, review before forgetting becomes severe, and shorten intervals for weak topics.
Spaced repetition improves long-term retention by reviewing information at expanding intervals before it is forgotten.
| Module | Decision value |
|---|---|
| Main metric | Shows the primary grade, time, speed, mastery, or retention result. |
| Goal gap | Identifies the distance between current status and target outcome. |
| Health score | Scores academic readiness from 0 to 100. |
| Risk level | Highlights failing risk, time deficit, comprehension risk, or forgetting risk. |
| Recommendation | Suggests the next practical study action. |