Hello!  If you don't want students to see assignments yet, choose SAVE instead of ASSIGN.  That way, you can come back later and actually assign them.  There is no "hide" feature.

If you really only want students to do things in a given order, you can assign them with different times.  The first one due at 11:00, the second at 11:01, etc.  Then their list will be in the order you choose.

Hope this helps!

Amy

Post 1 million assignments then let them go at it.