Getting the lat/long by address is not directly relative to QV. But you can try to use geocoder webservice (google maps or so) directly from load script and store the coordinates. Read the Google Geocoding API online help.
After that, there are plenty of examples (with and without extensions) how to take some benefits from geo data with googlemaps.
search for google-maps-address-data in the Community or look at the attachment as a working example for getting coordinates from address
I think you can get different color for each type of school; change the backgroun color of first expression of your google map chart (scatter)depending on school type
AddressToCoordinates.qvw 154.2 K