Students accidentally deleting pages I have distributed to them

Is there a settings where I can prevent students from accidentally deleting pages I have distributed to them. This should be a setting option for schools. Also I would like to be select parts of the pages I create as locked so students cannot delete an activity on the page. With options to have boxes that students can do there work in and this is the only changes they can make to distributed pages. Help a teacher reduce a headache please.