Chinese depends on daily accumulation. After junior high school, learning Chinese will not be too difficult. Junior high school English has the foundation of primary school, the vocabulary is not too big, the grammar is simple, and it is not too difficult to make good use of classroom time; Mathematics is a little more difficult. Many children can't adapt to algebraic thinking, and with the very abstract plane geometry, many children will have a hard time learning mathematics, especially in the third grade, which needs to work hard because of the combination of quadratic function, trigonometric function and plane graphics.