DM NO. 870, S. 2023. CONDUCT OF DEVELOPMENT OF TEACHING AND LEARNING RESOURCES FOR THE PILOT IMPLEMENTATION / STUDY OF THE MATATAG CURRICULUM (GRADES 1 TO 3) Posted on August 24, 2023 by DepEd Mandaluyong Leave a comment DM NO. 870, S. 2023. CONDUCT OF DEVELOPMENT OF TEACHING AND LEARNING RESOURCES FOR THE PILOT IMPLEMENTATION / STUDY OF THE MATATAG CURRICULUM (GRADES 1 TO 3) Memorandum Numbered