In this Venn diagram, you can set different colors for all three areas.
The first page provides students with access to click and edit all areas whereas the second and third (Master) pages go together.
Teachers would set the parameters on the Master and lock it before sharing with students.
Students could then edit Page 2 without selecting or editing those areas by accident.
Make sure to delete the pages you aren't using by right-clicking on the bottom tab and selecting Delete.