Theoretical examination: generally speaking, it refers to the practical examination of test paper topics. Usually, answering questions on the computer or paper is the basis of practice. Without theory, practice can only be said to be mechanical repetition, and without any improvement, we can't learn. Practice test: Dutch ball is the only collective ball game in which men and women compete together. It has the characteristics of equal interaction, fair competition, paying attention to skills and avoiding confrontation, and is known as the "gentleman's movement". The teacher will hold a good game and make rules, and the teacher will score according to the students' performance on the court.