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Meet Our Facilitators

David Barkan

David Barkan has an international reputation as a master group facilitator and consultant to organizations dedicated to social change. He holds a Ph.D. in Clinical/Organizational Psychology and a B.A. from Boston University. He regularly consults with schools, non-profit organizations and community collaborations across the U.S. and around the world.  He has dedicated his career to helping people and groups find creative solutions to life and work’s most challenging problems.

Stella Beale

Stella Beale began her career in education twenty years ago teaching English in the public schools in North Carolina. Since then, she has lived and worked in Michigan, New York, and California. She spent six years as the English Department Chair at Greenhills School in Ann Arbor, Michigan and five as a class dean at San Francisco University High School. For the past three years, she has worked as Associate Director of Upper School at Windward in Los Angeles, California. As Associate Director, Stella has many disparate duties and responsibilities, but those that most interest her concern supporting faculty in creating curriculum and becoming more effective teachers.

Reveta Bowers

Reveta Franklin Bowers was both born and educated in Los Angeles, California. She is in her final year as the Head of School at the Center for Early Education in Los Angeles, where she has been for the past 44 years. For the last fifteen summers, Reveta Bowers was engaged as the Lead Faculty Member at the NAIS Institute for New Heads and taught more than 700 NAIS Heads of School. Reveta has served and continues to serve on a number of boards.

Malika Carter

Malika Carter spent her twenties teaching in independent schools in California and Arizona, staffing for President Clinton and Minority Whip Steny Hoyer (D-MD), and working in high tech in Colorado. Malika received her California teaching credential in 2003 from Mills College and spent three years teaching fourth grade in San Leandro before joining the Live Oak faculty in 2005. After teaching fourth grade for four years, Malika moved to the position of seventh grade Humanities teacher.

Giselle Chow

Giselle Chow is a career teacher, facilitator, and educational leader, she has developed and led organizational change processes with for profit and non-profit organizations. Her background in issues of equity, inclusion, and instructional leadership in schools has developed into a lifelong interest in what can occur when groups of disparate thinkers are aligned and engaged in complex work, searching for possible solutions.

Rachel Concannon

Rachel Concannon is the Middle and Upper School Counselor at Head-Royce School in Oakland. She is a Marriage and Family Therapist with over twelve years of experience helping adolescents and adults through challenging times. Prior to working at Head-Royce, she was a school counselor at Alameda High School and King Middle School and a therapist at Planned Parenthood. In her role at Head-Royce she counsels students and faculty, helps guide the Women’s Affinity group, leads the teacher mentor program, and teaches Life Skills classes to 7th and 8th graders. Rachel lives in the East Bay with her husband and two young children, and enjoys hiking with her friends and dog.

Lori Cohen

Lori Cohen is the Dean of Faculty at the Bay School of San Francisco. Prior to her current position, Lori taught Humanities, Literature, and Religion/Philosophy at Bay for many years. Lori also coordinates Teacher Development seminars, in-house professional development, for Bay faculty and has begun a Teaching Fellows program that will be entering its third year. This will be Lori’s fourth year as a co-facilitator/teacher leader in Teaching Foundations, a program that brings her joy and professional rejuvenation.

Andrew Davis

Andrew Davis is the Head of School at Mt. Tamalpais School in Mill Valley. He served as a Head of Middle School and Director of Admissions at Crystal Springs Uplands School before assuming his present responsibilities. His teaching career includes three years as a middle school history teacher at the Hamlin School. You can read more of Andrew’s writing at

Elizabeth Denevi

Elizabeth Denevi is the Associate Director for Mid West Educational Collaborative, a non-profit agency that works with schools nationally to increase equity, promote diversity pedagogy, and implement strategic processes for growth and development. Previously, she served as Director of Studies & Professional Development at Latin School of Chicago. In this position, Elizabeth was responsible for the stewardship and integration of curriculum from pre-kindergarten through grade 12, as well as for the oversight and coordination of professional development and evaluation for all faculty.

Rachel Garlin

Rachel Garlin is a multi-disciplinary teacher and faculty leader with over fifteen years of experience in the classroom. She received her BA in Social Studies from Harvard University and her teaching credential from Cal State. Rachel currently teaches high school Humanities at The Bay School in San Francisco; she also brings recent experience as a faculty leader and music specialist at Live Oak School. This will be Rachel’s third year as a co-facilitator in Teaching Foundations.

Crystal Land

Crystal Land is an experienced educator, facilitator and conference leader. She has served in many positions in her 25-year career at the Head-Royce School in Oakland including Assistant Head/Academic Dean, Director of Admissions and her current position as Head of School. Crystal lives in Oakland, California with her family, and balances work with running, travel and writing.

Ernie Levroney

Ernie Levroney has eleven years of teaching experience in Independent Schools and has worked as a science teacher, academic integrity advisor, dean of students and dean of experiential education, and as a department chair during his career in education. Ernie fell in love with research and education when he participated in a summer internship at the NIH after his senior year in High School. He developed a deep love and admiration for the way viruses work as that was the focus of his Ph.D. and Post-Doctoral work. Equally, he is passionate about teaching at the Secondary School level; he enjoys sharing his passion for science and the way things work with his students.

Tom Malarkey

Tom Malarkey is a longtime educator who has focused his work on urban schools, teachers, and students. He has taught high school English and first grade, and was the director of the Summerbridge Program in San Francisco, an academic empowerment program for middle school students, and Senior Program Officer for Summerbridge National. Since 1996, he has worked with the Oakland-based National Equity Project ( coaching public school teachers, school leaders, and district leaders around equity-centered change.

Steve Morris

Steve Morris is in his ninth year as the Head of the San Francisco School (SFS), a private, pk-8 school. He has been working as a teacher and administrator in independent schools for the past 20 years. Steve has also served as a Trustee on numerous Boards including but not limited to: The California Association of Independent Schools (CAIS), The Urban School of San Francisco, The San Francisco Day School, California Teachers Development Collaborative (CATDC), Bay Area Teacher Training Initiative (BATTI), People of Color in Independent Schools (POCIS), and Youth Speaks, a San Francisco-based arts program.

Alison Park

Alison Park is the founder of Blink Consulting, and has been working with schools and educational access organizations for eleven years to critically rethink diversity and inclusion. Before Blink, Alison taught in the independent, public and community non-profit sectors for thirteen years.


Leslie Powell

Leslie Powell is a veteran educator and lifelong learner with a degree in developmental psychology and a multiple subjects credential. In her tenure at Head-Royce she has held many leadership positions including lead teacher, Dean of Faculty & Students in the summer program, Intern Teacher program director as well as her current role as Assistant Head of Lower School. She believes in skillful and effective communication as a means to foster strong, positive relationships and authentic dialogue.

Katherine Preston

Katherine Preston, licensed Marriage and Family Therapist, has been a practicing psychotherapist for over twenty years. She is currently the mental health consultant for the San Francisco Friends School and she teaches lifespan development and family systems theory at Sofia University in Palo Alto. She also maintains a private practice in San Francisco and has held many clinical leadership positions overseeing and providing clinical training and supervision for therapeutic school-based services.

Peggy Procter

Peggy Procter joined the Windward community in 2009 as Director of Upper School.  Prior to Windward, she served as Dean of Students at the La Jolla Country Day School and Dean of Juniors and Seniors at the Branson School near San Francisco. Peggy received her B.A. in Government and Spanish from Dartmouth College and her M.A. in Spanish from Middlebury College in Madrid, Spain.

Debbie Reed

Debbie Reed’s life’s work has been in schools and she brings a wealth of experience to the work of a consultant. During her forty years as an educator, she has worked in public and private schools, urban and suburban schools, parochial and nonsectarian schools, co-ed schools and single-sex schools. In June of 2014, Debbie retired as the Head of School at Polytechnic School, a K-12 coed independent school enrolling 860 students in Pasadena, California.


Ron Ritchhart

Ron Ritchhart is a Senior Research Associate at Harvard’s “Project Zero” where his work focuses on issues such as teaching for understanding, the development of intellectual character, creative teaching, making students’ thinking visible, and the development of school and classroom culture. Ron spent fourteen years as a classroom teacher in New Zealand and the United States, and holds an Ed.D degree from Harvard University.

Larisa Showalter

Larisa Showalter found her calling in teaching while volunteer tutoring at her neighborhood’s public school in Boston. Larisa then went to Wellesley to get certified to teach and later received her M.A. in teaching social studies from Teachers College, Columbia University. She held a variety of teaching and administrative roles on the east coast, including Assistant Head of Upper School and Interim Head of Upper School. Most recently she was the Co-Director of the Center for Teaching and Learning at the Windward School in Los Angeles and taught eighth and tenth grade history. Now she is a founding faculty member and History Department Chair at the new school, Geffen Academy at UCLA, which will begin accepting students in 2017.

Kristi Thompson

Kristi Thompson is the Lower School Learning Specialist at Head-Royce Lower School. Before her over ten-year tenure as a Learning Specialist she was a teacher and also worked in museum education. She is a graduate of UC Berkeley, Mills College, and JFK University. Kristi is deeply interested in the personal and professional journeys of women in education as they seek to continually pursue personal and professional leadership, fulfillment and professional growth, while working to create and maintain healthy balance, well-being, and a strong sense of self.

Sharon Thompson

Sharon Thompson is the Assistant Head of School at Polytechnic School.  She has also held administrative leadership positions at  Phoenix Country Day School (AZ) and The Seven Hills School (OH). As an English teacher, she  taught students in grades 8-12 and has been a department chair. She has served as a division director/head and assistant division head; she has also been a grade-level dean and a college counselor for many years in three different schools.


Meet our facilitators! The CATDC works with the best facilitators to deliver our collaborative, supportive, and inspiring workshops.

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