Hi @DavoudKhoini
No, Pages is not really a place for students to submit work privately. As instructor, you can create a page and set it to allow students to edit it, but they are all editing the same page, and they cannot upload their own pages.
The normal way to have students submit work privately is through Assignments: https://community.canvaslms.com/t5/Canvas-Basics-Guide/What-are-Assignments/ta-p/9
