JoanSullivanRowenaLagrosaParentCenter20thStreetElementary-1-310×240 (1) Published February 22, 2018 at 310 × 240 in From principal to Partnership, Joan Sullivan sees good leadership as the key to success for low-performing schools ← Previous Next → Joan Sullivan and Rowena Lagrosa, of LAUSD Parent Services, at the opening of 20th Street Elementary’s Parent Center.Joan Sullivan and Rowena Lagrosa, of LAUSD Parent Services, at the opening of 20th Street Elementary’s Parent Center.