Options and timetable software for secondary schools
Secondary schools across Korea build their timetables with Timetable Expert
Comments from secondary school teachers across Korea who use Timetable Expert.
Phew, I got it all done thanks to you. With our old software there would have been unscheduled lessons everywhere, but your algorithm is good, so it was much easier, and the interface is clean too. I was very happy using it.
It used to take three full days, and this time I really finished in half a day. We have a lot of rules for labs, gyms and other shared rooms, and our old software couldn't handle them all, so I did a lot by hand.
This time I suddenly took over the timetable with no handover, and thanks to you I was able to start the semester well. I really wanted to say thank you.
If what I had been doing was digging with a shovel, this felt like an excavator. You handled it remarkably cleanly and fitted it to our school. If I'm in this role again next year, I think spending our budget here is a must.
It's very convenient to see which part of the timetable setup is the problem and fix it. Thank you so much :)
I used to build the timetable in Excel, and moving here has made things much easier. Setting up more complex blocks of lessons was hard at first, but you explained it well and I picked it up quickly.
I'm amazed at how well this is built. I especially like the suggestions that make the timetable less likely to go wrong.
Thank you for building our option blocks so well. If I hadn't found Timetable Expert at the end of the semester, I would have been in real trouble. Thank you so much.
See what it does at each stage, from planning the new school year to cover during term.
Design option blocks from student choices, along with class-taught subjects, where students who chose the same subject share a homeroom and take it together. Reduce the number of students not placed and keep section sizes even. The result becomes your teaching load sheet, ready for heads of department to fill in.
Send each head of department a link. Who teaches each class, the labs, gyms or other shared rooms they need, and teachers' unavailable times all come back to one place. Mistakes in lesson counts are caught before you build the timetable.
Enter your school's own rules, such as how many classes can use a lab or gym at once, lessons that must run at the same time, limits on lessons in a row, part-time teachers' working days, each teacher's unavailable times, and periods to avoid for each grade.
It counts how often teachers teach three periods in a row and how evenly lessons spread across the week, and improves both. If lessons stay unscheduled, it finds the rules causing it and shows you. Refine the timetable in the editor while checking for conflicts.
Automatically finds lessons that can be swapped. A teacher requests a swap, it gets approved, the timetable updates and everyone is notified. See projected lesson shortfalls before the end of term.
From student choices to the timetable.
From teaching loads to cover and lesson swaps during the year.
Ask ChatGPT, Claude or a similar assistant in plain language. Upload your files, say what you need, and the AI works on your option blocks and timetable.
*Uses MCP, an open standard for connecting AI to outside services such as Gmail, Canva and Notion.
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Upload student choices to start building option blocks
When every student takes a different mix of subjects, option blocks and timetables get complicated.
A new timetabler
“I took this on with no handover, and I don't know why lessons go unscheduled.”
The previous timetabler has moved schools, and even after days of runs in the old software, some lessons stay unscheduled. It's hard to tell whether the teaching loads or the rules are the problem, so it's unclear what to fix.
See the checks before generation and why lessons go unscheduledCurriculum coordinator
“Will these option blocks give us a timetable? Class-taught subjects feel out of reach.”
Balancing numbers for one subject throws another off, and there's no time to try class-taught subjects. Whether a timetable is possible only becomes clear just before the school year starts.
See class-taught subjects and checks that the timetable will workAcademic deputy head
“Do we need separate subscriptions for options, timetables and cover? Do we need a server too?”
It runs in the browser. There's nothing to install and no server to set up. Build the timetable straight from the option blocks, and use the final timetable as it is for cover and lesson swaps during the year. There's no need to subscribe to all three separately.
See plans and pricingLeave complex lesson placement to the software. You can also see why a timetable can't be built.
Yes. You can import data from Excel in the formats we support. Tell us what you use and we'll check.
Yes. You can export timetables to Excel.
Yes. Some schools build the timetable in Timetable Expert and handle cover and lesson swaps in the software they already use. Your school decides when to move that over as well.
Timetable Expert does not collect students' personal data. We only receive the student ID numbers and subject choices needed for option blocks and timetabling.
We don't receive students' personal data, and teacher names are anonymized before they reach the AI. The AI only works with student ID numbers, subject choices, and classes, subjects and lesson counts.
No. Everything runs on the web. There's nothing to install, and you can use it outside the school network too.
Yes. We provide the quotes and contract documents your school's process requires, and issue invoices to match how your school pays.
Our team answers by live chat and email.
Tell us about your school, and we'll walk you through a free trial and how to get started.
LSLABS Inc. | CEO: Jaebok Lee
Business registration no. 614-81-08192
Address: 4F 401-J792, 79 Gimpohangang 9-ro, Gimpo-si, Gyeonggi-do 10071, Republic of Korea
Email: support@timetable.expert
Phone: +82-70-4138-0149 (Weekdays 09:00–18:00 KST)
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