Katie Mosman » Grangeville High School Staff Directory Go back to directory. Add to Address Book. Katie Mosman Instructor Grangeville High SchoolAG Work 910 South D Street, Grangeville, ID 83530 work Work Phone: 208-983-0580work Work Email: mosmank@sd244.orgINTERNET Categories: Grangeville High School, Uncategorized Updated 4 months ago.