My Pre-Lab for I #21 is with a student and not glued-in. Yours should be glued in.
The only work I currently have being graded is I #21 and the I #21 Final Model which was completed and turned-in on Friday, 5/31/19.
Everything else has been passed back (unless you turned-in late work).
Mrs. Batt is the 7th grade Life Science teacher at Hawthorne Middle School.