A feature of the old Google spreadsheets was to be able to append &newcopy to the end of the URL. What this would do is when you share a view only link with a student, it would prompt the student to make a copy. This is a feature I used all the time with students and sharing templates with colleagues. Unfortunately this feature no longer works with the new Google Sheets.
ALL GOOGLE DOCUMENTS
The /copy works with ALL types of documents. Sheets, Documents, Slides, Draw!!
Replace /edit with /copy
In the URL up in the address bar delete the /edit at the end of the link. For a spreadsheet you will ALSO delete the #gid=#### to the right of the /edit. Instead type /copy
The URL on this Google Drawing is
DELETE the /edit and replace with /copy
Notice when you click on the link that it prompts you to make a copy of the drawing.
The URL on this Google Sheets spreadsheet is
DELETE the /edt#gid=3 and replace with /copy
Note that your #gid= will be followed with a different number than 3, that number refers to the tab ID.
Notice when you click on the link that it prompts you to make a copy of the spreadsheet.