Brett Picou, 30, an art teacher at P.S. 52, was charged with sexual abuse of a child under the age of 11.
Police say 27-year-old substitute teacher Chukwuma Duru is accused of forcible touching and endangering the welfare of a child at the Bronx Career and College Prep High School on Feb. 9.
The alleged incidents took place during the 2010-2011 school year. The children in question are now ages 8 and 9.
Wilbert Cortez, a teacher at P.S. 174, has been charged with two counts of second-degree course of sexual conduct against a child and two counts of endangering the welfare of a child in the Queens incidents.