Marissa Matthews was a Montessori child from ages 2.5-11. She studied opera as an undergraduate and received a B.A. in Music from UC Berkeley.  After a couple years teaching English in Japan, she found her calling and came back to Montessori. She now holds an AMI diploma for ages 0-6 from the Montessori Institute of San Diego and a M.Ed. with a Montessori specialization from the University of San Diego. She still loves music and sings with the Oakland Jazz Choir. She is also learning to play the ukulele, which the children in the classroom greatly enjoy. She has one child of her own and loves to spend her time with her family singing, gardening, and camping. She joined TRIS in 2016.

Olga Morataya immi­grated to the United States from Guatemala in 1995. Since then she has acquired the Child Devel­op­ment Assis­tant Per­mit and the Child Devel­op­ment Assis­tant Teacher per­mit and has run her own in-​home day­care pro­gram. Olga has also taught children’s Chris­t­ian edu­ca­tion for over 15 years in Guatemala and in Oak­land. Olga has been at TRIS since 2008.

Yovanka Long started in TRIS in 2012 as a substitute teacher at the Primary Level, eventually transitioning to Montessori Guide for the school's Assistance to Infancy program. She holds a Bachelor of Arts degree in Childhood Education from Valparaiso,Chile. During her teen years, she found her passion in working with children. In 1986, she became a member of an organization, “Paz y Justicia,” whose work focused on helping single mothers and their infants.  After college, she discovered the beauty of the Montessori philosophy and pursued her AMS Primary training in San Francisco, and recently completed her AMI Assistance to Infancy training at the Montessori Institute of San Diego in La Jolla