Founder and Head of the School
Leslie was born in Colombia, and spent a good part of her childhood and adolescence in Italy with a three year interlude in Washington DC and Chile. From Rome, she moved to Belgium where she studied communication at the Université de Louvain. After moving to the United States, while searching for the best education that would allow her six children to develop their potential, Leslie came upon the work of Dr. Maria Montessori. Since then, she has dedicated her life to studying Montessori, teaching in Montessori environments and as administrator of The Renaissance International School, a Montessori school that is the only genuine tri-lingual Montessori school in the United States. Leslie is a parent educator and coach as well as a trainer for the International Network of Children and Families. She regularly teaches an eight-week Redirecting Children’s Behavior course to Bay Area parents. She serves on the Board of Trustees for The NewGate-Field School, a model school of the Montessori Foundation in Sarasota, Florida, and is also on the Board of the International Montessori Council. Leslie lives in Oakland, California with her husband and enjoys traveling to visit her six children and eleven grandchildren who live around the world.
Assistant Head of School
Rosario was born, raised and educated in Mexico City, Mexico. She graduated with a Bilingual Elementary Teaching Certificate and worked in several private schools in Mexico City prior to shifting her attention to the Montessori Method. She took her first Montessori course in Bergamo, Italy. She graduated with an AMI elementary diploma, in 1971. Upon graduation, Rosario married and moved to Miami, Florida, where she was one of three Montessori teachers, at the elementary level, in the state of Florida. After a few years of working in Florida, she moved with her family to Mexico to direct one of the largest Montessori schools in northern Mexico, with 350 students ranging from 2.5 to 15 years of age. Years later, and upon returning to Florida, she continued working in various Montessori schools as a teacher and trainer and as a school consultant and conference presenter for the American Montessori Society. During those years, she continued her Montessori studies and obtained her Primary and Assistants to Infancy diplomas. Rosario has founded and owned Montessori schools and has been a firm believer of “education for life”, taking students, as young as 6 years of age, to different countries to immerse themselves in the different cultures. Rosario has been working at TRIS since 2005.
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