A Manhattan charter school gym teacher who allegedly forced two teenage girls to grope him inside the school and also texted them inappropriate photos of his body was arrested Friday.

On three separate occasions this month, Brett Bernstein, 32, an instructor at Harlem Prep Middle School on East 103rd Street, kissed the two 14-year-olds before grabbing their hands and placing them on his midsection, cops said.

On another day this month, Bernstein allegedly texted the teens images of his body.

Bernstein was charged with disseminating indecent material to minors, acting in a manner injurious to a child under 17 and sexual abuse, according to police.

The school fired Bernstein on Wednesday, according to a report on WPIX/Channel 11.