This scheduler keeps a list of the skills you are practising and tells you which to revisit next. For each skill you enter a confidence level from 1 to 5 and the date you last practised it. The tool turns that into a due date using an interval rule you can change.
It is a planning aid. It does not claim to know how well you have learned anything.
How do I use it?
- Check the review interval rule first. It gives the number of days until the next review for confidence 1 to 5. The defaults are 1, 2, 4, 7 and 14 days, and you can edit each one.
- Add a skill: type its name, choose your confidence from 1 (low) to 5 (high), and set the date you last practised it. Press Add skill.
- Read the upcoming review list. The earliest due date comes first.
- After you practise a skill, press Practised: went well or Practised: made errors. The tool updates the confidence, the last-practised date and the due date, and records the result in your history.
- Reset to demo data restores the starting list and default rule.
Example walk-through
The tool opens with two demo skills. Percentage change (reverse percentages) has confidence 2 and was last practised 10 days ago. The rule gives 2 days for confidence 2, so it was due 8 days ago and is shown as Overdue by 8 days, highlighted first.
Sine rule has confidence 4 and was practised today. The rule gives 7 days, so it is due in 7 days.
Now add a new skill, Factorising quadratics, confidence 3, practised today. It is due in 4 days and appears between the two. The overdue item stays first and stays visible. Adding new work does not hide what you have fallen behind on.
Press Practised: went well on the percentage skill. Confidence rises to 3, the last-practised date becomes today, and the next review is in 4 days. If you press Practised: made errors instead, confidence falls to 1, the skill is marked as promoted, and the review is due in 1 day, because the tool halves the interval and never goes below one day. The same button on Sine rule drops it to confidence 3, where the interval of 4 days is halved to 2.
Each row also shows its own working, such as the last date, the confidence and the interval used, so you can check the logic.
How do I read the result?
- Upcoming review list: skills sorted by due date. Overdue items are highlighted, then due today, then in a number of days.
- Error promoted: the skill was missed last time, so it is scheduled sooner.
- Completed history: a dated record of each practice and whether it went well.
Treat the list as a prompt. Open the skill, do a few questions from memory, then record honestly how it went.
What are the limits?
The intervals are a planning heuristic, not proof of mastery and not validated adaptive science. Confidence is your own judgement, and it can be wrong, so check it against real questions.
Your list and history stay in this browser. The cost of that privacy is that clearing site data or switching device removes them unless you used Download text.
Which lessons explain the output?
For the thinking behind recall and review, read build an editable recall-and-review routine. The demo skill on reverse percentages is taught in reverse a percentage increase. Pair this scheduler with the mistake log and retest queue so a skill that keeps failing also gets a fresh problem, and with the revision planner to fit the reviews into your week. More aids are on the tools page.
If reviewing is not enough to make a skill stay, our teachers in online one-to-one Mathematics tuition can look at how you practise it.