This is a single unit page, you are the admin that's why you can see this page, but students can't (unless you are using the tip for showing this page to the students).
By default students can access the units from the course status page only, for this they have to click on start course/continue course button (refer:
http://prnt.sc/bmwx2c) to go to course status page and there they can see the course curriculum timeline, refer:
http://prntscr.com/bne6uk, there is no sidebar shown on this page.
Let me know if this helps.