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.


Priscilla Medina was born and raised in the Bay Area. Her family is from Mexico. Priscilla 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.

Marie Meyer is a French primary and elementary teacher. She is in training to obtain her Montessori Early childhood credentials from the Montessori Teacher Education Center in Sunnyvale. She holds a bachelor in Biochemistry from France and a master of Art in Management from the UK. Prior to teaching, she worked as an IT consultant at EY in Paris. When she is not at school, she enjoys sailing, reading and exploring California outdoors. She joined TRIS in August 2018.