Faculty & Staff Directory

Alix Spivack
Gateway High School
Environment Science Teacher
Biography

Alix Spivack teaches Environmental Science 9 at Gateway High School.  A graduate of Middlebury College with a B.A. in Environmental Studies and Economics, Alix completed two credentialing programs at UC Berkeley Extension while undertaking post-graduate studies in the biological sciences at UC San Diego.  Prior to the classroom, Alix served as an environmental consultant for 10 years followed by 7 years working in education including as Executive Director of an environmental education non-profit organization.  Alix is excited to be teaching 9th graders the wonders of the natural world… in the San Francisco Bay Area and beyond!  A San Francisco native, she enjoys sweep rowing on a coached team, open ocean kayaking, quality family time, and trail hikes with her dog.

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Jeff Sprague
Gateway High School
Humanities Teacher, Instructional Lead
Biography

Jeff Sprague teaches Humanities 11 and Civics at Gateway. He earned his BA in American Studies from Yale and an MA from the University of Texas at Austin. He also received his MA in Education from Stanford. Jeff has been teaching for eleven years and brings a passion for issues of social justice to his teaching of American literature, history and government. When he is not teaching, Jeff enjoys playing guitar and hanging out with his family.

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Chris Stone
Gateway High School
Math Teacher
Biography

Chris (Geometry, Precalculus, Calculus) grew up in DC but had his first teaching experiences in the great city of Baltimore, MD. Yes, the city from The Wire. Chris moved to SF in 2016 to follow the California Dream like many others. Chris has taught middle school and high school in SFUSD and loved every day of it. He is excited to teach at Gateway. His focus will be building connections with students who don’t always have their voices heard, and giving them an outlet to shine. He intends to start a music production club (beat making/rapping) and to help out with the already-established skate club. 

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Juliana Valencia (she/her)
Gateway High School
Spanish Teacher
Biography

Juliana is ecstatic to join the Gateway family as a Spanish teacher. She grew up in Richmond, CA. She majored in Spanish Language & Culture at Simpson University. Juliana has taught ESL in China and in Oakland, California. She has also taught Spanish at her former high school LPS-Richmond. Outside of school, Juliana enjoys traveling, photography, museums & creating playlists on a monthly basis. 

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Aaron Watson
Gateway Public Schools
Director of Schools and Partnerships
Biography

Aaron Watson is our Director of Partnerships. Aaron formerly served as GMS' principal and is proud to have worked with teachers, families, and students to found Gateway Middle School in 2011. Prior to becoming principal, Aaron led the advisory program and taught humanities at Gateway High School for seven years and worked in a wraparound social services program for children and families involved in foster care in Alameda County. He earned a BA from Brown University and an MA in Education from UC Berkeley. Aaron also earned an MA in Educational Leadership from UC Berkeley's Principal Leadership Institute. Outside of Gateway, Aaron enjoys getting outdoors, traveling, and spending time with his family.

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Rebecca Wieder
Gateway High School
Co-Principal
Biography

Rebecca works to develop a cohesive, equity-oriented approach to teaching and learning through her role as Co-Principal. Before coming to Gateway, Rebecca taught humanities at Oakland Technical High School and earned her M.Ed. from UC Berkeley's Multicultural Urban Secondary English (MUSE) Program. She received her BA from Brown University, majoring in American Studies and Latin American Studies. Outside the classroom, Rebecca can be found exploring San Francisco's wild places with her husband and two young children.

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Tim Woolgar
Gateway High School
Science Teacher
Biography

Tim Woolgar teaches Physics and is a member of the leadership team working on Student Life. He was born and raised in England but moved to San Francisco after traveling around the world. He earned his Bachelor of Engineering in Aeronautical Engineering at Salford University in Manchester and flew with the Royal Air Force before working in the computer industry. Tim started teaching at Gateway in 2004 as a long-term substitute and then taught Chemistry and Physics at Lowell High School before choosing to come back home to Gateway in 2006. He has a Masters in Education from San Francisco State University.

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