ZeroClash: teacher substitution software for schools Teacher substitution, sorted before the bell.
A teacher calls in sick. ZeroClash shows who is free that period, best pick first. Assign in one tap, and the teacher gets it on their phone.
Free for 30 days. No card needed.
From sick call to substitute, before the first bell.
Priya Sharma calls in sick at 7:52. Here is the rest of the morning.
Mark who is absent
Full day, late, or leaving early. Her periods show up for substitution.
Pick from who is free
Only teachers free that period, best pick first, with the reason shown.
She gets it, and taps Seen
Anita gets the substitution on her phone. The office sees she has seen it.
The office, in ZeroClash
Anita's WhatsApp
- 1The office taps Assign
- 2Anita gets it on WhatsApp
- 3She taps Seen, the office sees it
No more staff list and phone calls.
The old way is slow, and it quietly tires out your most willing teachers.
The old way
- Guess who is free from a printed list
- Call around while the bell rings
- The same few teachers substitute every time
- Missed periods go unnoticed
With ZeroClash
- Only teachers free that period
- Best pick first: subject teacher, lightest day
- Substitutions shared fairly across the staff room
- Every missed period listed by name
New to arranging substitution? Read how to arrange teacher substitution
The substitution message goes on WhatsApp.
The teacher taps Seen, so the office knows. Fewer morning calls.
₹249 a month, on top of your plan
1,000 WhatsApp messages a month.
See who is carrying the load.
Who substituted most, and which periods had no substitute.
Fair substitution load
See who substituted most, so it is not always the same teachers.
Missed periods, named
Date, period, class and teacher for every period with no substitute.
Excel in one click
By teacher, class and subject, with monthly and weekly trends.
Substitution reports come with Premium.
Made for CBSE, ICSE and State Board schools.
Wings and sections
Primary to senior, every section and division.
Android app and website
The office and teachers use it on any phone or computer.
Works with School ERP
Leave marked in ZeroSuite School ERP flows into substitution.
Your timetable too
ZeroClash also builds your school timetable.
Teacher substitution software, answered.
What is teacher substitution software?
It is software that arranges a substitute when a teacher is absent. Mark the teacher out and it finds the staff genuinely free that period, ranks them by subject fit and a fair substitution load, assigns the substitute in one click, and alerts whoever picks it up. It replaces the printed staff list and the morning round of phone calls.
How does ZeroClash arrange substitution when a teacher calls in sick?
Mark the teacher absent, whether it is a full day, a late arrival or an early leave, and it builds a substitution task for every affected period, then lists only the teachers actually free at that hour, ranked by subject fit and lightest load. It re-checks each pick before you assign, so you never hand someone a clash.
How does it keep substitution fair between teachers?
The ranking weighs who is lightest that day and back-to-back load, so substitutions are spread across the whole staff room instead of always landing on the same willing few.
Will the substitute teacher know they have been assigned?
Yes. The moment you assign, they get an alert on their phone naming the period, class, subject and who they are substituting for. With the WhatsApp add-on the substitution message also goes on WhatsApp, and the office sees when they tap Seen.
Can I see who is carrying the most substitution load?
Yes, on Premium. Substitution reports show the substitution load per teacher and flag when one person is quietly taking most of the substitutions, alongside per-class and per-subject breakdowns for any date range.
What happens to periods with no substitute?
They are never lost. A no-substitute list names the exact date, period, class, subject and absent teacher, so gaps stay visible instead of silently slipping through.
Does it work for CBSE, ICSE and State Board schools?
Yes. It is built for Indian schools with multiple wings, sections and divisions, and it is priced in ₹.
Can teachers see substitution details on their phones?
Yes. Teachers use the ZeroClash Android app or the website on any phone, and get an alert as soon as they are given a substitution.
Does it connect to our school attendance or ERP system?
By default an admin marks a teacher absent in one click. Optionally it syncs daily staff absences from ZeroSuite School ERP, so a leave marked there flows straight into the substitution workflow.
Is there a free plan, and how is it priced?
Yes. ZeroClash is free for 30 days, including 2 timetable builds and daily substitution, with no card needed. After that your timetables stay viewable and exportable. Pro is ₹499 a month or ₹4,990 a year for up to 25 teachers and 2 wings, and Premium is ₹899 a month or ₹8,990 a year for unlimited teachers and wings, the live staffroom board and substitution reports. The WhatsApp add-on is ₹249 a month on top of any plan, with 1,000 messages a month.
Sort the next sick call before the bell.
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