DM NO. 564, S. 2023. WORKSHOP ON THE HARMONIZATION OF TEACHING AND LEARNING RESOURCES ON FILIPINO SIGN LANGUAGE (FSL) Posted on May 30, 2023 by DepEd Mandaluyong Leave a comment DM NO. 564, S. 2023. WORKSHOP ON THE HARMONIZATION OF TEACHING AND LEARNING RESOURCES ON FILIPINO SIGN LANGUAGE (FSL) Memorandum Numbered