FOR PUBLIC ELEMENTARY AND SECONDARY SCHOOLS: 19TH NATIONAL CONVENTION AND SEMINAR WORKSHOP OF THE NATIONAL ORGANIZATION OF PROFESSIONAL TEACHERS Posted on August 28, 2018 by DepEd Mandaluyong Leave a comment DO MEMO NO. 18, S.2018. 19TH NATIONAL CONVENTION AND SEMINAR WORKSHOP OF THE NATIONAL ORGANIZATION OF PROFESSIONAL TEACHERS Memorandum Numbered