Superintendent Gabriela Mafi spends time substitute teaching multiple days each year at teachers' request. Last week, she served as a substitute teacher for Bolsa Grande High School teacher and last year's Orange County Teacher of the Year nominee David Cho. She taught Algebra I and Algebra II Trig. Dr. Mafi always enjoys spending time with students and said it was an honor to work in the classroom of such an accomplished GGUSD teacher.