What is 0th period (zero period)?

The software allows you to use one special period before the regular teaching starts. So for example if your kids have periods 1,2,3,4,5,6 you can also add 0th period, before these regular lessons.

Possible usages:
- create some "assembly lessons" that will happen before the 1st period
- allow certain subjects to be placed here. If you for example have shortage of special classrooms it may help you in ask the kids to come once per week earlier to the school.