Reserve items are not eligible for renewal, however, they may be checked out again after waiting an hour.  This is to ensure all patrons in the class have access to the items. 

See: Renew Your Materials

You may request a renewal of your Interlibrary Loan book through your ILLiad account or by contacting Interlibrary Loan. Renewals are granted at the discretion of the lending library. Renewals may not be requested for overdue materials.

It depends on the type of material, the status of your library account, and if there is a hold or recall on the item (Borrowing Books and Other Regular Circulating Items). See: Renew Your Materials.