In the US, https://www.bls.gov/cps/cpsaat11.htm https://www.bls.gov/cps/cpsaat11.htm shows that female teachers are 98.8% of preschool and kindergarten teachers

In the US, https://www.bls.gov/cps/cpsaat11.htm https://www.bls.gov/cps/cpsaat11.htm shows that female teachers are 98.8% of preschool and kindergarten teachers and 79.6% of elementary and middle school teachers. If your school had a pretty even mix of male and female teachers then your school was the exception.