Our team

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 Campus 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 Head Teacher

Ms. Sia is our preschool head teacher 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.

Mei Zhang, Founder and 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.

We are Hiring

We are looking for a passionate and qualified teacher to join our team. Candidates must be bilingual, have a Bachelors degree, and have at least 6 ECE units. We are looking for someone who can teach and is a Mandarin native speaker. We provide attractive packages. Please send us email if you are interested (info@challengeschool.us).


Our Staff
Challenge School is led by a team of experienced administrators.  We are friendly and passionate about bilingual education for young children.