Students Link to Collaborative Sheet
I am a big fan of using collaborative documents with students. Why open 30 when you can open 1. Share one Google Sheets spreadsheet and each student does their work on their own tab. When a student is done with their work they can copy the link to their sheet in the spreadsheet (or in the case of Google Slides, the link to their individual slide.) Each sheet in the spreadsheet has a unique URL. Having the student paste this link into the private comments of Google Classroom makes it easier to view that student’s work.