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Mei Zhang, Founder, Executive Director


Ms. Mei is the founder of Challenge School and has 10 years of teaching and educational administrative experience. Before starting the school, she was a pharmacist, practiced in China and later became an architect in the United States. Ms. Mei received her B.A. in Interior Architecture from Academy of Art University and her B.S. in Medicine from Sichuan University

Grace Yee, Executive Director


Ms. Grace joined Challenge School in 2009 and became the preschool director in 2010. Before working as a teacher, Ms. Grace had 10 years of experience in engineering and product management. Ms. Grace received an M.S. Engineering, an MBA from UC Berkeley Haas, and an Early Childhood Program Director permit from California Department of Education.

Kaily Chang, Belmont Director


Ms. Kelly has been teaching at Challenge for since 2006. She has over twenty years of teaching experience in Mandarin. Ms. Chang received her B.A. degree in Chinese from Chongshin University, and is pursuing her AA degree in Early Childhood Education at Canada College.

Sia Sanft, San Mateo Preschool Director


Ms. Sia is our preschool director for our San Mateo campus. Ms. Sanft received her B.A. degree in Education from Brigham Young University as well as an Early Childhood Education certificate from UCLA and Kern Community College.

Jenny Tsai, Belmont Preschool Director


Ms. Tsai is our preschool director for our Belmont preschool campus. Ms. Tsai received her AA. degree in Early Childhood Education.  She has over 15 years of experience as an early childhood teacher, head teacher and curriculum designer.

Sally Chang, San Mateo Afterschool Head Teacher


Ms. Sally has been teaching in Challenge School since 2014 and became the after school head teacher in 2018. She has ten years of teaching experience in Mandarin. Ms. Sally received her B.A. degree majoring in Chinese, minoring in East Asian Studies from UC Davis, and an Early Childhood Site Supervisor permit from California Department of Education. She is currently pursuing her Program Director Permit.