Before adding any lesson, count the hours you really have and compare them with the hours you have already promised. If the promised hours already exceed the real ones, another lesson makes things worse, not better.
The realistic revision planner shows an overload as a visible conflict instead of hiding it. The steps below let you do the same count by hand.
Why does more help sometimes make results worse?
A new lesson brings new work: the lesson itself, the practice after it, and often a bit of travel through your own head as you switch subjects. If the time for that work comes from sleep or from homework, something else slips.
Overload can look like weak understanding. A student who is tired and rushing will make the same errors as one who does not understand. Counting first stops you from treating a time problem as a knowledge problem.
How do I count my real capacity?
- Write down your free hours for a normal week. Subtract school, travel, meals, sleep, family time and regular activities. What remains is your real study time.
- Choose a spare amount. Keep about two hours unplanned, so that one bad day does not sink the week.
- Subtract the spare from the free hours. This is your planning limit.
- List what you already carry: homework, test revision, existing classes, projects.
- Add the hours and compare with the planning limit.
- Only then add the new lesson, counting the lesson and its follow-up together.
Worked example
Hui Ling has 14 free hours in a normal week after school, travel, meals, sleep, family time and her weekly sports practice.
She keeps 2 hours spare, so her planning limit is 14 − 2 = 12 hours.
What she already carries:
| Item | Hours |
|---|---|
| Homework | 7 |
| Test revision | 4 |
| An existing weekly class | 2 |
| Total | 13 |
She is already 1 hour over her limit before anything is added. She then considers a new one-hour lesson with 30 minutes of follow-up practice, which is 1.5 hours.
13 + 1.5 = 14.5 hours, which is 2.5 hours over the planning limit of 12, and even over the 14 free hours by 0.5.
Her options are clear once the numbers are written down. She can shorten test revision by reducing it to the two weak topics, move the existing class to fortnightly if that is possible, or choose not to add the lesson now. Each choice is a decision, not a surprise on Thursday night.
What is a common mistake?
The usual slip is to count only the lesson itself and forget everything around it.
Mistaken count: “My free hours are 14 and I carry 13. One hour of lesson makes 14. It fits exactly.”
This leaves no spare hours, ignores the follow-up practice, and treats a full week as a safe one.
The correction is to count the lesson with its follow-up, and to keep the spare hours out of the limit. A week that “fits exactly” is full, and a full week breaks when anything changes.
Check yourself
1. Free hours: 10. Spare to keep: 2. Already carrying 6.5 hours. A new lesson plus follow-up is 1.5 hours. Does it fit?
Show answer
Planning limit: 10 − 2 = 8 hours. Total with the new lesson: 6.5 + 1.5 = 8 hours. It fits exactly, with no extra room. It is possible, but any lost block will need to be moved into the spare hours.
2. Free hours: 12. Spare to keep: 2. Already carrying 9 hours. A new lesson plus follow-up is 2 hours. Does it fit?
Show answer
Planning limit: 12 − 2 = 10 hours. Total: 9 + 2 = 11 hours. It is 1 hour over. Shorten or move one existing item by at least 1 hour, or start with a shorter follow-up.
3. Which is the stronger signal of overload: one missed evening after a school trip, or homework being finished after 11 pm on four nights in a row?
Show answer
The second. One missed evening has an obvious cause and does not repeat. Four late nights in a row show the weekly total is too high, and a lesson added on top would land in the same space.
What do I do with the result?
If the count shows space, plan the new lesson into specific blocks, as in building a revision plan from available blocks. If it shows overload, decide what moves before you add anything.
If you do add help, prepare questions about ongoing arrangements so that schedule and workload are discussed openly with the teacher. More routes are in the students’ guide.
Some weeks really are too full, and the sensible decision is to add nothing. Other times the count shows space but one topic keeps stalling. For that case, online one-to-one tuition lets a teacher spend the time on the single topic rather than adding general hours.