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Meet Wallenberg's Administration


Ms. Cheryl Foster

Ms. Foster has been an educator with SFUSD for 19 years at all levels, including high school English teacher, reading specialist and instructional reform facilitator (teacher coach) and administrator. She studied both English and psychology at the University of Arkansas before moving to San Francisco. She received her Masters of Arts in Education from the Principal Leadership Institute at UC Berkeley. This is her 8th year as Wallenberg's principal. 


She believes in educating the whole child, high expectations for both academics and behavior and providing a well-rounded educational experience for high school students that includes rigorous core classes, visual and performing arts, and career technical education, such as biotechnology and computer science. 


She loves the honesty, intelligence and compassion of Wallenberg students and believes we have the best students in the City!  


In her free time, Ms. Foster enjoys reading, gardening, bird watching, hiking with her son and hanging out with her 15 year old cat Guinevere. 



Assistant Principal

Ms. Staci Kavanagh


Ms. Kavanagh is a San Francisco native.  She has been a teacher for over 16 years.  She was the Art teacher at Raoul Wallenberg High School for the past 6 years, where she also held the positions of Teacher Leader and Department Chair for the Visual And Performing Arts Department (VAPA), and became National Board Certified.  She is an advocate for social change, striving to close the achievement gap and ensure success for all students.  She spearheaded the Advanced Placement Diversity Action Plan, working with the counselors to recruit and support underrepresented students into Advanced Placement classes and helped Wallenberg become an AVID school, implementing AVID strategies to better support struggling students with organizational and note-taking skills


Ms. Kavanagh enjoys spending summers camping and hiking with her family.  She has two boys, ages 5 and 7. They have two furry family members: cats Sebastian and Harry “Sneaky Paws”. 


Assistant Principal

Ms. Hollie Mack

Ms. Mack has worked as an educator for the past 11 years both in SFUSD and Jefferson Union High School District. She has worked as an English Teacher, a Humanities Teacher,  and as an Instructional Reform Facilitator (teacher coach). She studied Social Work and English Literature at the University of Maryland, College Park, where she obtained her Bachelors degree. Upon moving to the West coast she spent four years working in the non-profit sector where she taught a work-readiness program for youth in Oakland and San Francisco.  Upon realizing that being in the classroom was the best way to combine her love for working with teenagers and the written word, she enrolled at the University of San Francisco, where she obtained her teaching credential and a Masters of Arts in Teaching. After nine years in the classroom Ms. Mack chose to become an administrator. She then obtained her administrative credential and a Masters of Arts in Education from the Principal Leadership Institute at the University of California, Berkeley.  This is Ms. Mack's first year at Wallenberg where she works as the Assistant Principal of Curriculum & Instruction.  In her free time Ms. Mack enjoys reading, writing, knitting and spending time with friends.