I am sorry. I wasn't clear in my question. I created a project, and I assigned the project to a student. The project appears in my student's dashboard as a "next up for you" "class/weekly" project. However, I don't see the option to unassign anywhere...the project I assigned does not appear in the lessons tab for the class.
The project originates as a project on my "my projects" page/tab, and it was assigned from there, but there is no unassign option there.
If the student attempts the project, it appears in their completed projects section ( of class/weekly" projects.). It also appears in their my projects page/tab and in the projects tab of the lessons page for the class.
If I reassign, a second copy is created but it doesn't appear as a new "next for you" but as a completed project.
Thus I can neither unassign a project, or reassign a project. (for example if I modify the code).