Toronto Montessori Schools, now rebranded to "TMS School", was the first Montessori school in Canada. Founded by Helma Trass in 1961, it still remains the most well-known Montessori school in Ontario. The school is now expanded into a high school and includes students from 18 months (Toddler) to grade 12. The Head of Schools is currently Dr. Glenn Zederayko. The school's first location was in Toronto, which is why, despite being located now in Richmond Hill, it maintained its name 'Toronto Montessori Schools'. TMS School has two campuses in Richmond Hill.