Faculty

Tim Bearden — Math, Science, History & Social Science
Tim graduated from UC Davis with a B.A. in Economics and a minor in History. He has experience in data analytics, as well as over seven years’ experience teaching and tutoring. Tim has worked with a broad array of students, from elementary-aged students practicing their reading skills to professionals brushing up on their math to pass professional certification tests. He has a lot of experience working with high school students, and he enjoys working closely with students to tailor his lessons to their specific needs. In his free time, Tim enjoys reading, writing, programming, being outside, and watching the Warriors.

Chris Britton — Math, Science
Chris graduated from the University of California, Santa Cruz where he received a B.A. in Pure Mathematics. He holds a teaching credential from Dominican University of California and completed his student teaching at Novato Charter School. With a keen interest in helping students with learning differences, Chris worked as a paraprofessional for Healdsburg High School, serving a broad variety of student needs before taking a job at Lindamood Bell. There, he strove to find innovative ways to engage and build confidence in his students. Trained in Lindamood Bell’s methodology, he has helped many students with learning differences meet their reading comprehension goals. Chris also tutors with Tutor Corps, providing support for all levels of math, reading and writing, as well as test prep (SAT, SSAT, ISEE, and HSPT), specializing in students with learning differences. In his spare time he enjoys playing piano, reading, and cooking Italian cuisine.

Anschel Burk — English, History, Math, Spanish
Anschel Burk received his B.A. in Sociology and Anthropology, with a double minor in Education and Spanish, from Carleton College in 2014. He grew up in the Bay Area, until he left for college. After graduating, he completed two AmeriCorps terms of service. With AmeriCorps, he worked as a College Access Coach and as a Math Teaching Assistant. Anschel taught in the public school system in North Carolina before he moved back to the Bay Area in 2016 to work with students on reading and language comprehension. Anschel loves working with students to integrate their passions into the subjects he teaches, and is looking forward to a great school year!

Christie Colla — ASL, Spanish, French
Christie is a language specialist and passionate tutor for students of all ages. She is a native French and Dutch speaker and moved from Belgium to the United States in 2004. She has a passion for working with individuals who are up for a challenge and has tutored/instructed language classes for French, Dutch, Spanish, German, and American Sign Language (ASL). Christie loves nature, animals, and is passionate about Art History and classical music. She is currently continuing her education at Gallaudet University to study linguistics. Christie holds many certificates for courses, from Study Skills to Differentiated Learning and many subjects in between. Christie shares her home with her husband, two dogs, and three cats.

Jim Fish — Math, Science
Recovering from an inability to sit still and be quiet in class, Jim managed to enter University of Florida’s Invitational Honors Program and eventually graduate with a BA. He went on to do lab tech work for USDA and then earned a Primary Certification from the AMI, Montessori’s international organization. Jim mixed teaching in private and public schools with tutoring and subbing as well as jobs for fun, like soda jerk, movie usher, and professional magician. Jim has a Masters in Education from Dominican, and certifications in Math and Science. He prefers working with students one to one, in partnership. He also paints and creates bonsai.

Eden Frazee — English, History, Math, Art
Eden Frazee graduated from University of California, Santa Cruz with a BA in the History of Art and Visual Culture in 2015. While in college, she was able to explore her academic love for the arts, writing, and even ecological sustainability, on which she facilitated a student-led course. Eden is deeply curious about alternative forms of education, and has instructed in a variety of environments, including teaching Yoga and Mindfulness, leading classes for grades pre-K-8 at an educational summer camp, and doing private tutoring. She is dedicated to learning from her students, always remaining curious to how they may best grow and face challenges confidently. Her passions include art and creative pursuits, social justice, mental health, mindfulness, and self-expression. When not at school, you can expect Eden to be cooking up a vegan feast, hiking around the hills of the Bay, experimenting with arts and crafts, or exploring local museums and galleries.

David Goodlett — English, History, Math
Born in San Francisco, but raised in Philadelphia and Omaha, David has a B.A. in English with minors in Philosophy and Religion from Gustavus Adolphus College in St. Peter, Minnesota. David has taught preschool, elementary, middle, and high school in public, private, and charter schools throughout the Bay Area, working with students in general education, special needs students, and gifted populations. Additionally, David has also tutored extensively, done CAHSEE and SAT prep, taught STEM courses for middle schoolers and helped aspiring teachers pass CSET and CBEST tests. David’s greatest academic joy is teaching history. Among his many pursuits, David enjoys meditation, hiking, exercise, playing guitar, songwriting and recording and he performs throughout the Bay Area and beyond.

Benji Kessler — Math, Science, Spanish
Benji grew up in Albany, California and has loved teaching and learning from a young age. He attended Albany public schools, and majored in Biology with Honors at Dartmouth College in New Hampshire. Benji completed his PhD at UC Berkeley, where he studied the behavior and sensory ecology of webless spiders, exploring how they use vision and other senses to find and catch their prey. He believes that 1-to-1 education is the best learning model, and has been tutoring since 2007. Benji enjoys video games, stand up comedy, cooking and eating, and outdoor activities.

Aron Kingsbook — Science Department Chair, Math, Science, PE
Aron was born and raised in Oakland, California. He received his Bachelor of Sciences in Marine Biology from the University of California, Santa Cruz. Since then, he has occupied a variety of educational roles in both outdoor and classroom settings with people of all ages and backgrounds. He has worked as a scientific-diver for NOAA, a kayak guide in Monterey Bay and the San Juan Islands, a professional team-builder for companies in the Silicon Valley, a marine science teacher for middle school and high school students, and most recently, partnering with Americorps to teach math at his old Middle School in Oakland. Aron believes that fostering curiosity and exploration is the best path toward a lifetime of discovery and learning. He enjoys surfing, backpacking, cooking, reading, drawing, guitar and species-identification (especially birding!)

Vanessa Lemaire — Math, Science, Photography, Film Production
Vanessa Lemaire is an award-winning environmental filmmaker, who holds a Multimedia & Video degree from San Francisco State University and a M.Sc of Environmental Science from the University of Earth Sciences of Montpellier, France. Vanessa loves working with teens. Her recent feature documentary featured three teens, with whom she toured to 16 film festivals, won two awards and met with actress Geena Davis. She has four years of public teaching experience and is a parent of a 10 year-old with learning differences, which enables her to deeply understand the engagement, enthusiasm and personal connection required to build trust and motivate youth with diverse learning profiles. At Tilden, she teaches Math, Science of the Earth, Film & Photography, and draws upon her storytelling and visual content creation skills to present course material from multiple perspectives, tailored to each individual learner.

Allie Mages — Math, Science
Allie received her B.A. in Psychology from Mills College, where she focused on developmental and cognitive psychology and also enjoyed her studies in math, computer science, and biology. Allie has tutored a wide range of students, from six-year-old English language learners to older adults returning to school at community college. For eight years, Allie worked at Autistry Studios, a therapeutic makerspace and day program, with teens and adults on the autism spectrum as a maker, mentor, and teacher of a wide array of subjects. Allie is passionate about working with individual students to find what works best for them and to help empower them to understand and advocate for themselves. In her spare time, Allie enjoys reading, modern dance, creative writing, games, and hanging out with her cat.

David Maynard — Math, Science, English, History & Social Sciences
After attending a STEM-focused high school in Nashville, David switched gears to the ALPHAS (arts, literature, philosophy, history, anthropology, and semiotics) receiving his B.A. in Classics from Carleton College. His career path has meandered from coffee shops to accounting firms to educational behemoths—working at both Pearson and ACT—but he always returns to teaching and tutoring and now has over twenty years of experience working with students of all ages and backgrounds. As an independent scholar, David has published on satire, finance, and independent filmmaking, and in his free time he plays chess and enjoys the beauty of the Bay Area.

Jenny Montañez — English Department Chair, English, History & Social Science, Science
Jenny is a Bay Area native who grew up in the beautiful city of Pacifica. After working in cosmetics sales for almost a decade (including 5 years at Sephora as a Fragrance Master and Color Expert) she decided to return to school to study Early Modern European History. Jenny completed her studies at UC Berkeley in 2017 with a B.A. in History. While studying, she tutored and taught English and History, particularly at the college and high school levels, and was integral in piloting the Supplemental Instruction Program at Skyline College. In addition, Jenny participated in the Jump Start program, which helps struggling and/or disadvantaged high school students with mentoring and academic assistance. More recently, she tutored inner city elementary school students with reading and writing through the BUILD Literacy Program at UC Berkeley. She has a passion for working with students and helping them achieve their fullest potential. In her spare time, Jenny enjoys reading Historical fiction (especially if it’s about the Tudor Monarchy!), hanging out with her cat Scarlet, freelancing as a makeup artist, and delving into independent research projects.

Brett Nava — Spanish, English, History
Brett graduated from UCLA with a BA in English and a minor in Spanish. Brett has worked with students of all ages, from 3rd and 4th graders to high school students. His goal for every student is that they become life-long learners. Brett has a passion for literature, art, and history. He is originally from LA.

Todd Plummer — Math, Science
Todd holds a B.A. in English from the University of North Carolina at Chapel Hill and is near completion of an M.S. degree in Wildlife Resources at the University of Georgia, where he studied bird population dynamics and habitat management. Todd ran a tutoring business for 12 years specializing in math and science. His approach to teaching is to meet individual students’ needs by addressing unique learning differences, and temperaments. He has worked for numerous conservation organizations over a 30-year career. He worked as a wildlife biologist in the Sierra Nevada and spent four years researching pharmacological interventions for age-related diseases at the Buck Institute for Research on Aging. A California Certified Naturalist, Todd has led hundreds of bird hikes and nature outings and taught many outdoor ed classes for nature-lovers of all ages. He is the author of two science books for children, “I’ve Discovered Force” and “I’ve Discovered Energy.” He enjoys birding, hiking, kayaking, writing poetry, and reading.

Kelsey Robinson — Math, English, History, Japanese
Kelsey received his B.A. in International Studies with an emphasis on East Asia and has a certificate in Digital Global Studies and Multicultural Studies. Kelsey came to California to pursue his Master’s in Asian Pacific Studies at the University of San Francisco. During his undergraduate years, Kelsey learned about different Asian societies and languages, which led him to eventually study abroad in Japan and learn Japanese. In addition to Kelsey’s passion for Asian societies, he has lived in several states and has acquired a love for various activities such as boxing, tennis, reading, drawing, and poetry. Kelsey is looking forward to a wonderful school year.

Alistair Rogers — English, History & Social Sciences
Alistair was born and raised in San Francisco, CA, and enjoyed History from an early age. He earned his B.A. in History from UC Santa Cruz, which included a semester studying at Leiden University in the Netherlands and seeing all the things he was studying firsthand. Alistair earned his M.A. in History from San Francisco State University in 2010, and spent some time teaching at the collegiate level and also taking graduate level coursework in education at UC Santa Cruz. After two years working in the bikeshare world, he is back in education and sharing in his joy for history with students. In his spare time, he enjoys riding his bike around San Francisco, reading history (especially anything by and about Winston Churchill), hiking around the Bay Area, and attending both SF Giants baseball games and Cal football games.

Jill Silveira — English
Jill earned both her B.A. and M.A. degrees in English Literature from San Francisco State University. Wanting to share her passion for English literature with high school students, she later earned her single subject credential from Sonoma State University. She has taught in various high schools in the Bay Area. As a high school English teacher, Jill came to see that it was quite a challenge to reach each student in the classroom given each student’s individual unique learning style. She took courses from The Bay Area Writing Project which instructs teachers on how to teach writing as a way to empower students by arming them with self-confidence. Jill employed these practices and incorporated it into her private tutoring practice, which afforded a collective positive response. Jill comes to Tilden because she believes in the power of individualized learning and she wants to help each student, one by one.

Chizuki Squiers — Japanese
Chizuki Squiers was born and raised in Japan and graduated from Meiji University with a B.A. in English Literature and acquired her teaching license in TESOL in 1993. After teaching in Japan, Chizuki moved to the U.S., where she graduated from San Francisco State University with a M.A. in Mass Communication. Additionally, Chizuki wrote for the Hawaii Pacific Press newspaper as a journalist/columnist during her time in Hawaii and later in Oregon. Currently, she lives in Sausalito, CA with her husband and two daughters, and has been teaching at San Francisco Japanese school since 2014. In her free time, Chizuki enjoys playing piano, listening to music, reading, cooking, and walking her dachshund.

Nestor Teodoro Chavez — Math Department Chair, Math, Science, Spanish
Marin county native, Nestor Teodoro Chavez is a graduate of the University of California, Merced where he majored in a Computer Science & Engineering and minored in Applied Mathematics. Continuing his pursuit of knowledge and sense of community, Nestor joined a Professional Engineering Fraternity. Here he found his passion for helping others. Nestor was especially involved in UC Merced’s Peer Assisted Learning Support Program, where as a general and advanced mathematics tutor, he tutored college students at varying levels giving him a deepened understanding of personal aspirations and individual learning styles. Nestor often draws upon his training and experience in web design and computer science to present course material from multiple perspectives, tailored to each individual learner. Personal interests include sports, food, fashion, design, and his family and friends.

Kate Williams — History & Social Sciences Department Chair, English, History & Social Sciences, Math, Science
Kate Williams graduated from UC Berkeley in 2014 with a B.A. in History, focusing on 20th Century Europe. While in college, she taught basic astronomy to children at the Lawrence Hall of Science’s planetarium. Kate’s experience teaching astronomy helped to stoke a passion for teaching youth. After graduating, she led and developed educational field trips in San Francisco’s Presidio and Maritime Park. Kate enjoyed finding creative ways to teach hands-on programs about history, archaeology, poetry, and ecology. Kate is excited to bring her passion for English and History to Tilden! Kate grew up in a small town in California’s Central Valley – only an hour away from Yosemite. In her free time, she hikes, listens to podcasts, gardens, and tries to visit every museum in a hundred mile radius.