To import multiple schools, you must extract data for each school from your SIS. Each export file must reside in a separate directory on your PC. For example:
School 1: C:\School1\Data
School 2: C:\School2\Data
The next; add each school to Principalm Connect: To add a school, press the "Add..." button. Follow through each dialog boxes to input the information for the school's activation key, export file location, and directory where the school's pictures are located. Finally, when you are updating your SD cards, you will be asked which schools you would like to have on your card. You may choose some or all of the schools.
Please see the Principalm Connect Manual for more information.