课弈Block design that maximises satisfied students
First maximise fully satisfied students, then optimise for fewest sections, smaller classes or a target size, with balance as the final tie-breaker.
For · International schools
Timetabling for IB, A-Level, AP and IGCSE schools
Keyi turns student subject choices into option blocks and teaching groups, then produces timetables for every student and teacher — with native 6/10-day rotations, HL/SL hour differences, shared block grids across year groups, and a bilingual interface.
Common problems
- Many combinations; blocks take weeks by hand
- HL needs extra periods outside the block
- DP1/DP2 share teachers and clash
- Every add/drop needs re-checking
How it works
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1
Student choices
Online form or Excel
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2
Build blocks
Option blocks from real combinations
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3
Groups & fit
See who gets every subject
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4
Full timetable
HL/SL hours and rotations together
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5
Publish & run
Phones, cover, exams
How Keyi helps
HL/SL and simultaneous lessons
HL can add periods outside the block; lessons of different lengths can start together.
Rotation cycles and A/B weeks
6- and 10-day rotations and A/B weeks are native; each period can have its own times.
Student changes and SIS
Adds, drops and section swaps are clash-checked instantly; connect to ManageBac or PowerSchool.
Case study
An international school's G9 options: same 19 sections, largest class from 33 down to 26
We re-ran sectioning on the school's real choice sheet (89 students, 4 blocks): every student kept every choice; with the same 19 sections, physics went from 32/18/16 to 22/22/22 and the class-size standard deviation dropped from 6.0 to 2.3, in about 30 seconds.
Read the full case study →100%choices satisfied
33 → 26largest class
52 → 6total same-subject size gap
30ssolve time
FAQ
Does it handle IB DP 3 HL + 3 SL?
Yes. HL and SL can share a block, and HL's extra hours can be placed outside the block.
Can several year groups share one block grid?
Yes. When DP1 and DP2 (or G11 and G12) share a grid, shared teachers never clash.
Book a 30-minute demo
We'll run your real choice data live. We reply within one business day.
- Bring your existing Excel choice sheet
- Demo in English or Chinese
- Data used only for the demo, deleted on request