DM NO. 221, S. 2022. ORIENTATION ON NATIONAL SCHOOL BUILDING INVENTORY FOR SCHOOL YEAR 2021-2022 Posted on March 25, 2022 by DepEd Mandaluyong Leave a comment DM NO. 221, S. 2022. ORIENTATION ON NATIONAL SCHOOL BUILDING INVENTORY FOR SCHOOL YEAR 2021-2022 Memorandum Numbered