Parents at a Harlem school where the principal killed herself after allegedly cheating on Common Core exams have sent an angry letter to Chancellor Carmen Fariña complaining that their children’s education has since gone downhill.

The Teachers College Community School “has changed drastically” since the appointment of new principal Michelle Verdiner, the letter says.

More than 30 families have removed their kis from school since September 2015, the letter says, adding Verdiner hasn’t dealt with an increase in violence and bullying.

“We have been through enough as a school community,” the letter says.

In response, the DOE quoted a 2nd-grade mom who called Verdiner “extremely competent,” kind and collaborative.

Principal Jeanene Worrell-Breeden, 49, jumped in front of a subway train in June 2015.