In my opinion, the difficulty of mathematics learning in grade three is geometry and function. Geometry is generally about circles, and functions are quadratic functions. When the circle and function are combined, it is difficult, but it usually appears in the last question. Because the knowledge and difficulty of the circle in the new curriculum standard have decreased, the difficulty of the senior high school entrance examination is not too difficult, and it has indeed decreased in recent years. It's just that the difficulty of independent enrollment in other places has not decreased. Generally speaking, the knowledge of triangles and parallelograms is combined with quadratic function for training.