Generation failed pre-checks
• Review the on-screen list and fix items where indicated:
̵ No eligible room for a subject > update Rooms to permit the subject
̵ No teacher can teach a subject / insufficient availability > update Staff
subjects or PPA
̵ Class not uniquely named / fixed slot conflict > correct in Classes
̵ Period structure too tight > adjust My school year
A fixed class won’t place
• Confirm the fixed slot exists as a teaching period
• Ensure at least one eligible teacher and room is available at that time
• If you need multiple fixed lessons, create separate class records (unique names)
A lesson keeps moving when I re-run
• Lock it before you click Run again
The timetable looks sparse in one area
• Check subject–room permissions; you may have over constrained specialist
rooms
Glossary
• MIS: your School Management Information System
• Teaching period: any period not marked as break, lunch or registration
• PPA: Planning, Preparation and Assessment time (non-teaching allocation)
• Fixed class: a class pinned to a specific day/time
• Clone: duplicates a timetable and its linked resources so you can safely test
changes
Support
If you have questions or run into issues, contact our support team:
Email: timetablesupport@tes.com
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