Callie Harvey joined the TRIS community in 2012, shortly after she and her family moved to the Bay Area from Canada.  She attended a Montessori primary program as a child and is at home with both the materials and the approach.  She has lived in France as a Vivre Sans Frontières exchange student who obtained the baccalauréat diploma in French literature and as a college student who studied at the Sorbonne University.  She holds a Bachelor of Arts in French from Bryn Mawr College in Pennsylvania and a Master of Arts in Linguistics from Leiden University in the Netherlands. Her AMI Primary certificate is from the Montessori Teacher Training Center of Northern California.  In addition to French, she understands Spanish, some Dutch, and some Russian.  One of Callie’s favorite aspects of working at TRIS is collaborating with the wonderful families and the inspiring faculty.  Teaching French pastry camp over the summer is a definite perk, too!

Boa Xiong is an AMI Montessori guide from Detroit, Michigan. She completed her Primary training at the Montessori Institute of San Diego. She holds a B.A.A. in Fashion Design and Merchandising from Central Michigan University as well as, a Masters of Education in Montessori education from Loyola Maryland University. Boa worked as an assistant designer in New York City and an English teacher in Thailand before joining TRIS in 2016. In her free time, she loves to read, sew, and occasionally snowboard after a good snowstorm. Food is also a great love! Please feel free to send her any great recipes you have.

Maya Von und zur Mühle is a French teaching assistant from Alsace, France. She grew up speaking English, French and German and holds a BA in Liberal Arts with a major in English Literature from King’s College London. Previously, she has worked with children on a volunteer basis at Acorn Woodland Elementary during her semester abroad at the University of California, Berkeley and at the Children's Center in the Dunkirk Refugee Camp in the summer of 2016. She joined TRIS in September 2017.

Beatriz Zavala was born in Mexico and raised in Napa California. She is Montessori Guide. She joined TRIS in 2015. She has a background in office and business administration since she graduated from Napa Valley College in 2004. Working as a Montessori school administrator she became interested in the Montessori Philosophy and went to the Montessori Institute of Advance Studies in Castro Valley, California to get her AMS Teacher Credentials in Montessori Early Childhood in 2012. She has also combined her administrator and early childhood experiences and holds a licensed provider for a small family home day care. Since Beatriz became a Montessori guide, she implemented the philosophy at home with her three boys, and she has never been more proud and happy to see how independent her boys have become. In her free time, she enjoys painting and singing and she loves to go camping with her family.

Katrina Reyes was born and raised in the Bay Area and joined the TRIS community in 2017. She has a BA in Psychology from the University of San Francisco and a M.Ed in Curriculum and Instruction from the University of San Diego. Katrina received her AMI Montessori training and certificate for ages 0-6 from the Montessori Institute of San Diego in 2011. During her free time, she enjoys spending time with her family, dancing, and reading.

Paula Ruiz was born in Colombia. She has a Bachelor of Science degree in Bacteriology and Clinical Laboratory from Colegio Mayor de Antioquia, and a Masters degree in Occupational Health from Universidad CES. She came to the United States in 2007, and was drawn to The Renaissance International School's trilingual immersion program. She started teaching in 2008, incorporating her background in the Sciences with her work in the classroom. In 2012, she pursued her Montessori certification. Paula likes to read, knit, and travel in her spare time.

Maritza Hurtado was born in Oakland, California. In 2006, she went to Mexico and El Salvador to work with underprivileged children. This spurred her interest in education, and she went on to pursue her Early Childhood Education units from the Montessori Teacher Education Center, San Francisco Bay Area. She is also working towards her Bachelor of Science degree in Sociology. She came to TRIS in 2014, and currently works as a Spanish-speaking assistant.  In her spare time, Maritza enjoys reading, photography, and music.

Pricilla Medina was born and raised in the Bay Area. Her family is from Mexico. Pricilla has a background in Child Development as well as training  from The Montessori Teacher Education Center San Francisco Bay Area  (AMS). She is the Spanish assistant at the primary level at TRIS who enjoys the Montessori philosophy.  She has been a part of the TRIS community since winter of 2015.

Nora Jimenez has a B. A in Spanish Language from the Universidad de Guadalajara, Mexico.  She was in charge of the reading program in a K-12 private school in Mexico. Nora worked as a Spanish instructor at a private school in San Leandro before joining the TRS team in 2008. She took a Classroom Leadership course at The Montessori Foundation and a Early Childhood Assistant Teacher Course at Montessori Teacher Education Center of San Leandro in 2009. She started the primary Montessori training 2015-2017 at the Montessori Northwest School in San Francisco. She enjoys spending time with her two daughters.

Danielle Kravis is an English Guide in Primary IV. She joined the TRS Community in November 2016. Danielle was born in New York and moved to the west coast in 2016. She graduated from Hofstra University with a BA in Early Childhood Education and French. She attended the Montessori Institute of San Diego’s AMI Primary Training. In her free time, Danielle enjoys practicing yoga, reading, travelling, and exploring the outdoors.

Jessica Araiza is a native of Oakland. She is of Mexican descent and speaks Spanish at the native level. She is currently pursuing a bachelor's in Psychology at the California State University—East Bay. She has been working with children for most of her adult life and currently offers support at the primary level. Jessica has a particular interest in theories of psychology within Montessori education and has a strong interest in becoming more intimate with the Montessori philosophy.