There are quantitative evaluation methods and standards for math homework in grade three. Quantitatively evaluate students' understanding and mastery of basic knowledge and skills, but don't try to give a final evaluation with scoring symbols, but use orthographic method to count students' homework. Its symbol is designed as the number of strokes in orthography. When the students finish correcting the wrong questions, the missing strokes should be completed by themselves, so that students can consciously reflect and evaluate their learning situation.