My younger brother was taught by a teacher in the first class. They humiliated, insulted and underestimated. I don't know why he was silent and didn't tell his parents anything, but it came out only a couple of months later, when wild scandals began in the house in the morning with screams of "I won't go to school!" And in the notebooks stood three, despite the correctly found solutions. To transfer the child to the parallel class the director refused - the teacher will be offended.