Click on the System Administrator Tab and select Districts & Schools.
That will show you a screen listing your district information at the top:
Participating Schools List and School Local Identifiers
The schools for your district will be listed at the bottom of this page:
Add/edit the School ID field as needed to match the School IDs in your import file.
School Year Start Date
The School Year Start Date can be found when looking in Districts & Schools.
This month and day reflect the year-long period identified as the school year in the software. After this date passes, all students, classes, and test events from the school year will be archived and visible only in reports.
The default setting is July 1st, but the District Admin can change the date to suit their schedule.
Note: Only the month and day are accounted for, so the School Year Start Date does not need to be reset annually.