It is easy to focus on sex abuse by Catholic Priests. All abusers fall under the umbrella of the Catholic Church. Try to find statistics on school staff. Thousands of school districts spread the examples of abuse across a wide spectrum.
A study conducted by Hofstra University showed that many allegations of sex abuse are handled outside the criminal justice system. Offenders are allowed to resign or fired for cause other than sex abuse.
I’m sure that there is a reasonable explanation to explain the incident. She is a math teacher. I would guess she was teaching the new math, the part about “goesinto” and got carried away with the learning aids.