Staff & Board

Academic Staff

Bob Capune, 7th & 8th Grade History Teacher, has a BA in History from the University of California, Berkeley. Bob worked for two decades at the Lawrence Hall of Science, a hands-on children's museum. Although he likes Science, his true passion is the Humanities. He thoroughly enjoys teaching English and History instead of quadratic equations. An avid world traveler, Mr. C has visited every continent (except Antarctica). He brings photos, stories, and artifacts from these trips to his classroom to share and enhance curriculum.

Debra Hom, 7th & 8th Grade Math Teacher, has a Bachelor's of Science in Mathematics and a Master's in Education from UC Davis. Her hobbies include gardening, cooking, baking, listening to music, making jewelry and crocheting. Debra wanted to work at Manzanita because of the community support and feels the small classes will let her focus on each student's needs to succeed in math. She loves when students ask for help and tell her when they don't understand a topic. Growing up in a small community, she knows that everyone is willing to help and learn together. In her classroom, she strives to make math understandable and relatable to everyday life.

Robin Rivera, 6th Grade Teacher,

Heikki Koskinen, Music Teacher, was born in Finland and received his main education there, including private music studies, as well as Master of Science in Civil Engineering from Aalto University. After receiving scholarships to study music at the Berklee College of Music in Boston, Heikki moved to San Francisco in 1977. Heikki has over 35 years experience in teaching music in the Bay Area, as well as performing and composing from albums and multi-media events to scoring for film. Besides classroom and private teaching, he composes music for all media and leads his own jazz groups. Heikki's latest CDs, "Midnight Sun", "Full Moon" and "Northern Winds and Voices" feature Latin/Jazz arrangements of original and Finnish songs. His two children have graduated from college. Heikki is looking forward to bringing exciting music making to Manzanita.

Kumar Nemani, Technology and Art Teacher, earned his Bachelor's in Electronics and Communications in India and moved to the US to pursue a Master's in Engineering Management. After developing a profound interest in information security, he returned to school and is currently completing an Executive Master's program with the University of Cumberlands. Sravan has a wide range of interests, including film making/photography. He believes in the quote, "Technology is just a tool. In terms of getting the kids working together and motivating them, the teacher is most important." - Bill Gates

Elizabeth Brooking, 7th & 8th grade Science Teacher.  Ms. Brooking has taught in middle and elementary schools in West Contra Costa for 18 years. She earned her science credential and has been teaching -and loving- middle school science for more than 5 years. Ms. Brooking has written and tested science curriculum, led teacher workshops, and mentored new teachers.  She enjoys working with middle school students.  She is excited to join Manzy this year!


Katy Ott, 7th and 8th Grade English Language Arts teacher, completed a bachelor's degree in English at Tufts University. She then worked in sales and marketing in a variety of industries for 20 years before she decided to become a teacher. Ms Katy is passionate about literature and reading, as well as being a citizen of the world. She has lived abroad in both Australia and Vietnam, where she began her teaching career. Her hobbies include traveling, gemology, yoga and spending time with friends.

Adminstrative Staff




John Bibb ("Coach"), Assistant Principal and Athletic Director, has a Bachelor of Science Degree in Health and Physical Education from Stillman College in Tuscaloosa, Alabama, where he played collegiate football. Coach began teaching 6th, 7th, and 8th grade P.E. at Manzanita in 2015, after teaching and coaching multiple grade levels for 11 years in the Los Angeles area. In addition to his passion for teaching youth how to cultivate and live a healthy physical, emotional, and social lifestyle, he uses his former experience as head varsity high school football coach and boys/girls basketball coach to motivate and inspire students and create camaraderie among peer groups. Coach is a sports enthusiast and spends his leisure time exposing and engaging his two sons, ages 11 and 7, in athletic and sport activities.

Chantel C


Text: 707-342-9020

Chantel Caldwell, Director of Curriculum and Instruciton, is a zealous advocate for education equity who has supported diversity-rich student populations in the California Bay Area since 2002. Having worked primarily with underserved, vulnerable student groups and at-promise youth, she fervently supports teachers and teams in cultivating robust learning opportunities within safe, inclusive learning environments that are conducive to academic and social-emotional learning outcomes for all students.  Ms. Chantel facilitates and supports teams to effectively implement evidence-based pedagogy, Multi-tiered Systems of Support (MTSS), and data inquiry protocols. In addition, she uses cognitive and didactical strategies to promote reflective instructional practices, promote continuous improvement, and foster collective teacher efficacy. As Principal, she is committed to fostering educational equity and academic achievement for all students by partnering with families, supporting teachers, and providing access to resources.

Ms. Chantel was raised in Vallejo, California, where she attended Vallejo public schools. She has three school-aged daughters and empathizes with working families and is cognizant of the ongoing need for flexibility and compassion. Her hobbies include educational research, reading, fitness, cooking, spending time with her family, and pursuing growth in her faith.

Board Members

  • Board Chair: Shalon Thompson
  • Board Secretary: Janet Martinez
  • Fiscal Manager: Sanjuana Villalobos
  • Board Member: Blanca Gonzalez
  • Board Member: Margarita Vaca