PREPARATORY ACTIVITIES FOR THE IMPLEMENTATION OF PROJECT OPEN P-TECH FOR SCIENCE AND STEM SCHOOLS (POPSSS) Posted on February 11, 2021 by DepEd Mandaluyong Leave a comment 21-02-024. PREPARATORY ACTIVITIES FOR THE IMPLEMENTATION OF PROJECT OPEN P-TECH FOR SCIENCE AND STEM SCHOOLS (POPSSS) Memorandum Unnumbered