Southside ISD is Proud to Be an “ADSY” Partner May 25, 2021 by melaniemorgan Hello Families, Southside ISD is proud to be an “ADSY” partner. ADSY stands for Additional Days School Year. What does this mean? Check out the links below for facts about the program that is launching at Menchaca Early Childhood Center this year. English: https://www.facebook.com/558784964144467/videos/494010398639199 Spanish: https://www.facebook.com/558784964144467/videos/159261475946685