This did not happen to me, but to another parent in my grade level and I happened to be a witness to the mother screaming at the principal. Kiddo flunked his multiplication test. Mom freaked out and said Teacher was teaching multiplication wrong. Kiddo is confused because he is being taught one way at school and another way at home, with Mom saying school is wrong. Um... apparently Mom is teaching Kiddo that multiplication and addition are the same thing. Such as 7x2=9. Mom became angry when Teacher tried to explain the difference. So Mom took it to the principal and Principal just looked flummoxed. If Mom is so sure her mathematics are correct, how do you explain it's... not?