You taught them from fifth grade to high school. They multiply seven by nine and get thirty-two. Have you ever thought about harakiri?

You can take a horse to the river. You can even put it in the water. But it is impossible to force a horse to drink.
The teacher can stand on his head and show focuses, but if the child does not want to learn and think - he will not think. If a child can not blind the table of multiplication for 11 years - this child is DEBIL, and place him in the correctional school.