AI Timetable Generator for Schools | Make a Clash-Free Timetable and Handle Substitutions Automatically

An AI timetable generator for school builds a clash-free timetable automatically from your classes, subjects, teachers, periods per week and bell timings, while respecting the slots each teacher cannot take. The best ones also handle what happens every morning: they show which teachers are free in each period, suggest the right substitute when a teacher is absent, and track every teacher's workload. Class ON's AI Timetable Generator does all of this inside the school ERP, so the timetable, staff attendance and substitutions work as one timetable management system.

Key takeaways

Why I wrote this guide

Every school has a timetable in-charge, and every timetable in-charge knows the feeling. The first two weeks of April disappear into charts, erasers and phone calls. Just when the timetable is finally ready, a new teacher joins, another leaves, and half of it has to be redone. Then October comes, the winter bell timing changes, and the work starts again. And on every one of those days, someone has to stand at the staffroom board and fill the arrangement periods for teachers who are on leave.

I'm Milan Hans, Founder and CEO of Smartway Media Pvt. Ltd. in Ludhiana. Our AI-powered school ERP, Class ON, runs daily operations for schools across 24+ states, and the timetable is one of the jobs schools ask us about most. This guide explains how to make a school timetable, by hand and with AI, what to look for in timetable software, and how Class ON's AI Timetable Generator, Free Period Report and Smart Substitution Engine work, screen by screen.

What is a timetable generator?

A timetable generator is software that creates a school timetable for you. You tell it the classes and sections, the subjects, how many periods each subject needs in a week, which teacher teaches what, and the bell timings. It then places every period in the week so that no teacher is in two classes at once and every subject gets its time.

There are four ways schools make timetables today:

How does an automatic timetable generator work?

In simple words, the software searches through a huge number of possible arrangements and picks one that follows all your rules. Some rules can never be broken: a teacher cannot be in two classes at once, and every subject must get its periods. Others are preferences: spread Maths across the week, avoid putting the same subject twice in a row, keep a teacher's day balanced. A person juggles these rules in their head for days. The software checks them all in seconds.

This is what people mean by an AI-based or AI-powered timetable generator. It is not guessing. It is checking thousands of combinations against your rules, far faster than a person can, and returning one that fits.

Every automatic timetable generator, whether a desktop tool, an online timetable maker or a module inside a school ERP, works with the same four inputs:

1. Time: days, periods and bell timings
2. Classes: sections and the subjects each one studies
3. Teachers: who teaches which subject to which section
4. Rules: periods per week, teacher availability, labs, games and any preferences

The quality of the timetable depends on how complete these inputs are. That is why a generator inside the school ERP has an advantage: the classes, subjects and teachers are already there.

Why do manual and Excel timetables break down?

A school with 60 sections, 8 periods a day and 6 days a week has nearly 3,000 slots to fill, every week, without a single clash. That is why the paper chart causes so much stress.

An AI timetable generator solves the first four. A good school ERP solves all seven.

How to make a school timetable: step by step

These steps work whether you use paper, Excel or AI. The difference is how much of the work the tool does for you.

1. List every class and section, for example 6-A, 6-B, 7-A.
2. Fix the bell timing: number of periods, start and end times, and breaks. If the school has summer and winter timings, set both now.
3. Decide the periods per week for each subject in each class. This is your period allocation chart (see the example below). Follow your board's scheme of studies.
4. Allot teachers to each subject and section, and set a fair maximum number of periods per teacher per week.
5. Mark the limits: part-time teachers, slots a teacher cannot take, shared labs, the games ground and combined classes.
6. Place the fixed periods first: assembly, games, lab periods and the class teacher's period.
7. Fill or generate the rest of the timetable.
8. Check for clashes and balance the workload, so no teacher has an overloaded day.
9. Publish class-wise and teacher-wise copies.
10. Plan for daily absences, because every day some teachers will be on leave and their periods will need a substitute.

Example: period allocation for one class (48 periods a week)

This is only an example. Every school and board has its own scheme.

School timetable format (class-wise)

Teacher timetable format (teacher period timetable)

A teacher-wise view matters as much as the class-wise one. It is the only way to see whether a teacher's day is overloaded.

How to make a school timetable in Excel (school time table format in Excel)

If you are starting in Excel, make one sheet per class with days as rows and periods as columns, and keep teacher names in a drop-down list using Data Validation. Then add a master sheet that pulls each period from every class, and use COUNTIF to count how many times each teacher appears in the same period. Any count above 1 is a clash.

Excel can help you lay out and check a timetable, but it cannot generate one. That needs complex macros. It also cannot tell you who is free when a teacher is absent. That is where timetable software comes in.

How to make a timetable using AI: three ways

When people search "how to make time table using AI", they usually mean one of three things.

Can ChatGPT make a timetable for my whole school?

ChatGPT, Gemini and similar AI chatbots can draft a timetable for a class or two if you give them clear rules. For a whole school, they struggle. With 60 sections and 100 teachers, a chatbot can quietly put one teacher in two rooms at once, and it will not notice. It cannot see which teacher is absent today, cannot suggest a substitute and cannot track workload over the month. Use a chatbot for a first draft or to learn the method, and use timetable software for the real thing.

A ChatGPT timetable prompt you can copy

If you want to try it for a small timetable, a clear prompt gives far better results:

Always check every period yourself before you publish a timetable a chatbot made.

How to make a clash-free school timetable automatically

A timetable is clash-free when four things are true for every period of the week:

1. No teacher is in two classes at the same time.
2. No class has two subjects at the same time.
3. Every subject gets exactly its periods for the week.
4. No teacher is scheduled in a slot they are not available.

An automatic timetable generator checks all four for every slot. In Class ON, you mark teacher availability once, pick a class section, and the AI timetable generator builds a conflict-free schedule. Here is how it works, screen by screen.

How does the Class ON AI Timetable Generator work?

The Timetable Manager in Class ON has five parts, all inside the same school ERP that already holds your classes, teachers and staff attendance.

Step 1: Create your timetables, with dates

Each timetable has a name, a start date and an end date. A school can keep a summer timetable and a winter timetable side by side, for example "Time Table 2026-27" from 2 April to 2 October and "Winter Time Table (2026-27)" from 3 October to 31 March. Both stay active, each for its own dates, so the October change of timing does not mean rebuilding the timetable from scratch. Timetables can be exported whenever needed.

Step 2: Set the bell timing

Enter the periods, their start and end times and the breaks for each timetable. Summer and winter timetables can have different timings.

Step 3: Plan the timetable

Use Set Time Table and the Smart Planner to set up what each class needs and which teacher takes it.

Step 4: Mark when a teacher is not available

The Teacher Unavailability Manager shows each teacher's week as a grid of days and time slots. Click a slot to block it, for example for a part-time teacher, a teacher who leaves early on Saturdays, or a coordinator with fixed meetings. You can block or clear a whole week in one click. The AI engine respects these blocks when it generates the timetable, so a blocked teacher is never scheduled in that slot.

Step 5: Generate a clash-free timetable with AI

Open the AI Timetable Generator, pick a class section and click AI Timetable. It auto-generates a conflict-free schedule for that section. The list shows every class section with its timetable and class incharge, and can be searched by timetable, class, section or incharge. In one school using Class ON, the list covers 148 class-section timetables across its summer and winter timetables.

Step 6: View it any way you need

See the timetable class-section wise for students and class teachers, teacher-wise for each teacher's personal schedule, or timetable-wise for the whole school.

What is a proxy period or arrangement period in school?

A proxy period, also called an arrangement period, substitution period or adjustment period, is a period taken by another teacher when the regular teacher is absent, on leave or on duty. Most schools record these in a teacher substitution register, also called the arrangement register.

This is where most timetables actually fail. Making the timetable is a once-a-year job. Arranging proxies is an every-morning job, and it usually looks like this:

• The coordinator finds out who is absent only after the first bell.
• Free teachers are found by asking around the staffroom.
• The same few teachers get most of the proxies, because they are easy to find.
• A Maths period is covered by whoever is free, not by someone who can teach it.
• The register is incomplete, so nobody knows who took how many proxies this month.

How to assign a proxy teacher automatically when a teacher is absent

1. Absences come straight from staff attendance

The Assign Substitute screen lists every employee marked absent in staff attendance, with their designation. It covers non-teaching staff too, such as drivers, guards, helpers, gardeners and electricians, so the school can arrange cover for every role, not only classrooms. One click opens "Add Substitute", and a Today Substitute Report can be exported at any time.

2. See which teacher is free in which period

The Free Period Report shows, for any day, which teachers are free in each period, marked as ongoing now, upcoming or completed. On a Wednesday at 12:10 pm, for example, it listed every teacher free in Period 5 and the next period, with the count of free teachers beside each. A teacher counts as free only if they have no scheduled period in that slot, and add-on duties count as busy. The report can be filtered by teacher and printed for the staffroom.

3. Let the Smart Substitution Engine match and notify

The Smart Substitution Engine lists every period of every absent teacher: the time, the class and section, the subject and whether the teacher is absent or on leave. For each period, it suggests substitutes as an AI match. The coordinator picks one and clicks Assign & Notify, and the substitute is informed.

On a busy day, one button, Auto-Assign All, assigns substitutes for every absent teacher's periods at once. In the example screen, that meant 24 absences handled in one go. Schools can also switch automatic assignment on or off and adjust the settings.

4. Every substitution is recorded

The dashboard shows a substitution overview for the day. In one school, it read 22 substitutes assigned, 22 direct matches and 0 periods left unassigned. Substitute periods also appear in each teacher's workload, and the Substitute Report works as a digital substitution register, ready whenever the principal or management asks.

How to balance teacher workload in a school timetable

A clash-free timetable can still be an unfair one. The Class ON Timetable Manager shows the whole picture on one dashboard.

The dashboard at a glance

The teacher workload heatmap

The heatmap is the most useful screen for a principal. Each row is a teacher, and each column is a day of the week, followed by the weekly total, add-on duties, substitute periods and a grand total. Colours run from light to heavy, so overloaded days stand out immediately, and a small "+1" or "+2" marks substitute periods on the day they happened.

In one school's heatmap, a single glance showed one teacher with 10 periods on Monday and 51 for the week including substitutions, while another had 18 for the whole week. That is a conversation the principal can now have with facts, not guesses.

What principals do with this

• Balance the load before it leads to burnout or complaints.
• Share proxies fairly, because substitute periods are counted, not forgotten.
• Check subject hours against the board's scheme, for example whether English and Maths really get the time they need.
• Plan hiring with data: if one subject's teachers are always overloaded, the school needs another teacher, not more proxies.

The Workload Report and Substitute Report put all of this on paper whenever management needs it. Schools that use Class ON's Employee 360° Report can also add substitution periods taken to each teacher's monthly report, so the teachers who step in get credit for it.

Teacher timetable: what every teacher gets

A timetable generator for teachers should make each teacher's day clear, not just the school's. In Class ON, the teacher-wise view gives every teacher their own period timetable for the week, and any substitute period assigned to them is added and notified, so nobody has to check the staffroom board every morning.

Timetable app for teachers and parents

A timetable is only useful if people can see it. The Class ON app brings the timetable to the people who use it: teachers see their own schedule, and parents can see their child's class timetable. This makes Class ON a time table app for school as well as a timetable management app for the office.

Timetable software for a multi-branch school group

For school groups, Class ON runs every branch from one dashboard and one login. Each branch keeps its own timetable, teachers and bell timing, while the management sees all of them in one place.

Best timetable software for schools in India: Excel vs FET vs aSc Timetables vs Class ON

It depends on what you need the timetable to do. Here is an honest comparison of the four common choices.

Timetable generator online free: are free tools enough for a school?

Free online timetable makers are fine for a single class or a small tuition centre. For a full school, they usually fall short: you type all the data again every year, they cannot handle daily substitutions, and your staff data sits on an unknown website.

aSc Timetables alternative for Indian schools: price and free download

aSc Timetables is a well-known specialist tool. Its official website offers a free trial with all functions except export, and printouts carry a watermark. Listings on Techjockey show one-time licences starting at USD 149, with higher editions at USD 390 and USD 699, and "price on request" for exact India pricing. Check the vendor for current prices.

Free timetable software for school: FET

FET is free, open-source timetabling software, first released in 2002 and still updated, with version 7.10.3 released in September 2026. It runs on Windows, macOS and Linux and can generate timetables automatically. It is a generation tool, so daily substitutions, attendance and workload tracking have to be handled elsewhere.

Timetable generator for college

A college timetable follows the same principles as a school timetable: courses, sections, faculty, rooms and time slots. The difference is scale and flexibility, with electives, practicals and shared rooms across departments. A good timetable software for college needs automatic generation, faculty availability, room planning and a way to handle faculty absences.

Class ON has started working with colleges as well. If you run a college and are looking for an automatic timetable generator for college, talk to our team about setting it up for your departments.

10 questions to ask before choosing timetable software

1. Does it generate a clash-free timetable automatically?
2. Does it respect slots a teacher is not available?
3. Can it run summer and winter timetables with their own dates?
4. Does it show which teachers are free in each period?
5. Does it suggest substitutes for an absent teacher and notify them?
6. Is it linked to staff attendance, so absences flow in automatically?
7. Does it show each teacher's workload, including substitute periods?
8. Can you view and print class-wise and teacher-wise timetables?
9. Does it use data you already have, or do you type everything again?
10. Can several people use it online at the same time?

If the answer to the last seven is "no", the software makes a timetable. It does not run the school day.

Best school ERP in India with an automatic timetable generator

A timetable does not live on its own. It needs the list of teachers and classes, staff attendance to know who is absent, and the app to tell teachers and parents what changed. When the timetable sits inside the school ERP, all of this is connected. When it sits in a separate tool, someone has to copy data back and forth every week.

That is why more schools now look for a school ERP with an automatic timetable generator built in, rather than a standalone timetable tool. Class ON is an AI-powered school ERP with 100+ features, used by schools across 24+ states and every board, CBSE, CISCE, State Boards, IB and Cambridge. Its timetable module covers AI timetable generation, teacher unavailability, summer and winter timetables, the Free Period Report, the Smart Substitution Engine and the workload heatmap, all connected to staff attendance and the Class ON app.

School time table kaise banaye? (स्कूल टाइम टेबल कैसे बनाएं)

School ka time table banane ke liye ye 8 steps follow kijiye:

1. Saari classes aur sections ki list banaiye.
2. Bell timing fix kijiye: kitne period, kab shuru, kab break. Summer aur winter dono ki timing.
3. Har class mein har subject ke hafte ke periods tay kijiye.
4. Teachers ko subjects aur sections allot kijiye.
5. Jo teacher kisi slot mein available nahi hai, use mark kijiye.
6. Assembly, games aur lab jaise fixed periods pehle rakhiye.
7. Baaki periods khud bhariye ya AI se generate kijiye.
8. Clash aur har teacher ka workload check kijiye, phir class-wise aur teacher-wise copy publish kijiye.

AI se school ka time table kaise banaye?

Class ON mein pehle timetable ko dates ke saath banaiye, bell timing set kijiye aur teachers ki unavailability mark kijiye. Phir class section chuniye aur "AI Timetable" button dabaiye. Clash-free time table apne aap ban jaata hai. Jab koi teacher absent ho, to Smart Substitution Engine proxy teacher suggest karta hai aur use notify bhi karta hai.

MS Excel me school time table kaise banaye?

Har class ki alag sheet banaiye, din rows mein aur periods columns mein rakhiye. Teachers ke naam Data Validation se drop-down mein daaliye. Ek master sheet mein COUNTIF se check kijiye ki koi teacher ek hi period mein do jagah toh nahi. Dhyaan rahe, Excel khud time table generate nahi karta, aur proxy period bhi nahi sambhalta.

Time table banane wala app kaunsa hai?

School ke liye aisa app chahiye jo time table banaye bhi aur roz ke proxy periods bhi sambhale. Class ON ka AI timetable generator school ERP aur app ke andar hi hai, isliye time table, staff attendance aur substitution sab ek jagah chalte hain.

Conclusion: a timetable should run the day, not just hang on the wall

Making a clash-free timetable once a year is the easy half. The hard half is every morning: finding out who is absent, who is free, who should cover which class, and keeping it fair across the month. A good AI timetable generator does both halves.

With Class ON, the timetable is built with AI, respects every teacher's limits, switches between summer and winter timings by date, shows free teachers live, suggests and notifies substitutes, and keeps every teacher's workload visible. All of it sits inside the same ERP that runs your attendance, fees and parent communication.

Want to see your school's timetable built with AI? Call 90237-90237 or book a free demo.

Frequently asked questions

Which is the best AI timetable generator for schools in India?

The best AI timetable generator for a school creates a clash-free timetable automatically and also handles daily substitutions and teacher workload. Class ON's AI Timetable Generator does this inside the school ERP, with teacher unavailability, summer and winter timetables, a live Free Period Report, a Smart Substitution Engine and a workload heatmap.

How do I make a school timetable using AI?

Create the timetable with its dates, set the bell timing, plan the subjects and teachers for each class, and mark the slots each teacher is not available. Then pick a class section and let the AI timetable generator build a conflict-free schedule. Review it class-wise and teacher-wise before publishing.

How to make a school timetable (school time table kaise banaye)?

List all classes and sections, fix the bell timing, decide the periods per week for each subject, allot teachers, mark teacher limits, place fixed periods like assembly and games first, then fill or generate the rest. Check for clashes and balance each teacher's workload before publishing class-wise and teacher-wise copies.

What is a proxy period or arrangement period in school?

A proxy period, also called an arrangement or substitution period, is a period taken by another teacher when the regular teacher is absent, on leave or on duty. Schools traditionally record these in a teacher substitution register.

How can a school manage teacher substitutions easily?

Link substitutions to staff attendance, so absences are known at once. Use a free period report to see which teachers are free in each period, assign a suitable substitute, notify them, and keep a record of every substitution. Class ON's Smart Substitution Engine suggests an AI-matched substitute for each period and can auto-assign all of them in one click.

Is there a free AI timetable generator for schools?

Free online timetable makers work for a single class or a small centre. For a full school, FET is a free, open-source desktop tool that can generate timetables automatically. Neither handles daily substitutions or staff attendance, which is where a school ERP like Class ON helps.

Can I make a school timetable in Excel?

Yes, you can lay out a timetable in Excel and check clashes with COUNTIF, but Excel cannot generate a timetable on its own without complex macros, and it cannot suggest substitutes when a teacher is absent.

What is the price of aSc Timetables in India?

aSc Timetables does not list India prices on its website. Listings on Techjockey show one-time licences from USD 149, with higher editions at USD 390 and USD 699, and India pricing on request. A free trial is available with all functions except export.

Is FET timetable software free?

Yes. FET is free and open-source software that runs on Windows, macOS and Linux and can generate timetables automatically. It does not cover daily substitutions or attendance.

Can a school run separate summer and winter timetables?

Yes. In Class ON, each timetable has its own start and end date, so a summer timetable and a winter timetable can both stay active, each for its own period of the year.

Can timetable software handle teachers who are not available at certain times?

Yes. In Class ON's Teacher Unavailability Manager, you block the slots a teacher cannot take, and the AI generator never schedules that teacher in those slots.

How long does it take to make a school timetable with AI?

Generating the timetable for a class section takes moments. Most of the time goes into setting up the inputs: bell timings, subjects, periods per week, teacher allotment and teacher availability. In Class ON, the classes, teachers and staff already sit in the ERP, so a school spends its time on decisions, not data entry.

Is AI-based timetable software suitable for all types of schools?

Yes. Whether your school follows CBSE, CISCE, a State Board, IB or Cambridge, or a KVS-style eight-period day, you set your own bell timing, subjects and rules, and the AI works within them. It is especially useful for large schools, school groups with several branches and senior secondary schools with many streams and sections.

What is the best free timetable software for a CBSE school?

FET is a free, open-source desktop tool that can generate timetables, and free online timetable makers suit a single class. For a full CBSE school that also needs daily proxy periods, staff attendance and workload tracking, a school ERP with a built-in AI timetable generator, such as Class ON, is the practical choice.

Can AI make me a timetable?

Yes. AI chatbots like ChatGPT and Gemini can draft a small timetable from clear instructions, and AI timetable generators in school software can build a clash-free timetable for every section of a school and keep it running with substitutions.

What is a good ChatGPT prompt to make a school timetable without clashes?

Give the chatbot the days, periods and bell timings, the periods per week for each subject, the list of teachers with their subjects and classes, and clear rules such as "no teacher in two classes in the same period". Ask for one table per class and one per teacher, and ask it to list any rule it could not follow. Then check every period yourself.

Is there timetable software for school as a free download?

Yes. FET is free to download for Windows, macOS and Linux, and aSc Timetables offers a free trial with all functions except export. For colleges, the same tools can be tried, but a college with many departments usually needs an online system that handles faculty absences too.

Which school ERP in India has an automatic timetable generator?

Class ON, an AI-powered school ERP used by schools across 24+ states, has an automatic AI timetable generator built in, along with teacher unavailability, summer and winter timetables, a Free Period Report, a Smart Substitution Engine and a teacher workload heatmap.