DM NO. 640, S. 2022. MASS TRAINING OF ALS TEACHERS ON THE IMPLEMENTATION OF THE ALS LAW AND ITS IMPLEMENTING RULES AND REGULATIONS Posted on July 8, 2022 by DepEd Mandaluyong Leave a comment DM NO. 640, S. 2022. MASS TRAINING OF ALS TEACHERS ON THE IMPLEMENTATION OF THE ALS LAW AND ITS IMPLEMENTING RULES AND REGULATIONS Memorandum Numbered