Ellie Berler, 1st Grade Teacher (interim)
Ellie Berler was born and raised in San Francisco. She attended the San Francisco Waldorf School first through eighth grade before attending the Putney High School, in Vermont. She completed her undergraduate education at Whitman College in Walla Walla Washington, where she studied Studio Art and Religion. She formally began teaching before the pandemic in Israel at a local Arab Waldorf School, Tamrat El Zeitoun. After returning to the Bay Area, she completed her Waldorf Teaching Training at The Bay Area Center for Waldorf Teacher Training while teaching in local Waldorf early childhood programs (including MSW). She has recently returned from teaching preschool at the Cedarwood Waldorf School in Portland, Oregon. Ellie loves to sing, especially in community, learn and spend time with her family in San Francisco. 

Katie Heneghan, 2nd Grade Teacher
Katie Heneghan joined Marin Waldorf School’s faculty as first grade assistant teacher in the fall of 2022, and she took the role of 1st grade class teacher the following year. Before joining our faculty, she worked as a nature connection mentor, facilitated health programming in middle and high schools, taught at a performing arts school, and served as a counselor at a wilderness therapy program. Ms. Heneghan holds a bachelor of arts in theater from Whitman College and a master’s in public health specializing in community health education from the University of Minnesota. She completed a 10-month nature connection and social justice immersion with Weaving Earth Center for Relational Education in Sonoma County. She graduated from the Bay Area Center for Waldorf Teacher Training in 2023. When Ms. Heneghan is not busy teaching, she enjoys spending time outside birding and tracking wildlife, swimming, handcrafting, doing jigsaw puzzles, playing music, traveling near and far, and coming home to her cat, Green Bean.

Mia Terziev, 3rd Grade Teacher
Mia Terziev joined the Marin Waldorf School faculty in 2013, and she led the class of 2022 from 2nd grade to 8th grade. After their graduation, she took the role of lead teacher for the Class of 2030. Before joining our faculty, Ms. Terzeiv held diverse roles as a portrait photographer, a fulltime mom, a birth doula, the owner of a small business making organic cotton baby clothes, and matchmaker. She holds a bachelor's degree in French and photography from San Francisco State University and completed the Waldorf teacher training program at the Bay Area Center for Waldorf Teacher Training. She has two children with her husband, Jasper, and she loves singing, gardening, hiking, and anything to do with interior decorating. 

Rising Percey, 4th Grade Teacher
Rising Percey led the Marin Waldorf School class of 2020 from 5th grade to graduation, then returned to the 5th grade classroom in the fall of 2020 to lead the class of 2024. Before becoming a Waldorf teacher, Ms. Percey was the director of an adult literacy center in Honolulu, later returning to the Bay Area to teach literature and writing to middle and high school students at SAT prep centers throughout the Bay Area. She holds a BA in English literature and creative writing from UC Berkeley and she completed her Waldorf training at the Bay Area Center for Waldorf Teacher Training. Ms. Percey comes from a family of educators: Her grandmother was the director of Chidren’s Fairyland in Oakland, her mother ran an in-home daycare for 38 years, and her sister is a teacher to the visually impaired. Ms. Percey was drawn to Waldorf Education because it reflects her core values: a strong sense of community, personal responsibility, and spirituality. She enjoys spending time outdoors, and being with her family and friends.