I have two suggestions for Sketchup for Schools:
Identification of who drew the model. Copying among students can be problem. There are ways of detecting it, but it would be much easier if the file included a property that identified the student who created the model - i.e. username of person logged in when file was created…
Access to shared folders. What is easier for assessment and feedback than each student giving their teacher access to their Google drive folder? They simply save their work as normal, and the teacher opens it in SketchUp for Schools directly from where it was saved. No copying, moving, uploading or downloading required. Gold standard would be if it is possible for only teachers to access shared folders, not students.