FOR PUBLIC ELEMENTARY AND SECONDARY SCHOOLS: CONDUCT OF THE CY 2017 4TH QUARTER NATIONWIDE SIMULTANEOUS EARTHQUAKE DRILL (NSED) Posted on December 13, 2017 by DepEd Mandaluyong Leave a comment 17-12-074. CONDUCT OF THE CY 2017 4TH QUARTER NATIONWIDE SIMULTANEOUS EARTHQUAKE DRILL (NSED) Memorandum Unnumbered