I think the essentials should include two levels: individual and collective. For the collective, we need to pay attention to the choice of dance music, dance species and choreography. For a single dancer, the coordination of input and cooperation is the most important. The following is what I learned from Baidu, including the definition and contact information. Although it is theoretical, theory is a guide to practice. I hope it is helpful and enlightening to you. According to the research of art historians, the earliest art produced by human beings is dance, and square dance is the mother of dance. Square dance originates from social life and comes from the people, who are the creators and performers of square dance. Many people say that square dance is a folk dance, which is incorrect. Square dance should be divided into performance forms, not dance types. Can't square dance perform modern dance and ballet? With the development of society, the art of dance is also developing. People used to define square dance as a kind of dance, which is a narrow definition in itself. I think square dance is a form of performance, not a kind of dance, but folk dance accounts for a large proportion in square dance. Square dance is performed in the audience. At least three actors perform directly in front of the audience, and the actors and the audience can communicate directly. The stage and audience are integrated, and the audience and actors are integrated, giving the audience a special feeling. This is the first feature of square dance. 1, Happy Theme: Due to the particularity of the dance performance form in the square, the performance site is surrounded by audiences on three or four sides, the performance stage is integrated with the audience, and the performance site is crowded and lively. This makes the performance content of most square dances must be enthusiastic and cheerful, which is emotional dance in dance terminology. This form of expression determines that it is impossible for square dance to show sad content or very artistic works. This is determined by the special performance environment of square dance. So concise and cheerful content is the second feature of square dance. 2. Group dance: Square dance is a performing art form with strong mass participation. The performances are all group dances, ranging from tens to hundreds. The scene was very lively. Square dance must be performed in the square, the performance venue is generally wide, and the number of performers cannot be too small. Therefore, square dance is generally expressed in the form of group dance. Most performances in wide venues do not require solo, duet or threesome. Therefore, group dance is the third major feature of the square. 3. To put it simply, square dance is an art form performed in the square. At the same time, the performance of square dance is very flexible. The time can be long or short, fully reflecting the subjective and objective wishes and needs. It is impossible for the performance environment of the square to have good scenery and beautiful dance to reflect the complex performance content. Therefore, the square dance should not be too complicated in performance content and dance structure, and only full emotions and formation changes can win the audience's love. Therefore, simplicity is the fourth feature of square dance because of poverty. 4. Self-entertainment: Self-entertainment is the main feature of square dance since it came into being. People don't seek fame and fortune when they participate in square dance, it's entirely for their own entertainment. For example, the square dance practiced in the morning of the fifteenth day of the first month is mostly a spontaneous performance of the people. Square dance is an art of expressing emotions by dancing, which allows the dancers to vent their hearts and produce a sense of excitement. At the same time, the audience also got spiritual enjoyment. This gives dancers a chance to express themselves and their sense of self-worth. This is the reason why the square dance is decided to entertain itself. This is also the reason why the square dance has been enduring since its birth. To sum up, square dance is a kind of dance form combining self-entertainment with performance, with special performance form, enthusiastic and cheerful performance content and group dance as the main body. The following is the suggestion of contact method in the encyclopedia: according to the difficulty of a set of movements, the arrangement of learning a full set of movements, the level of physical exercise and the proficiency of mastering movements, you can choose the following teaching methods. Practice in stages: practice each movement separately. It is often used when learning a new set of movements, the whole set of movements is unskilled and the movements are complicated. Segmented practice: divide the whole set of movements into several sections, practice each section of the movement one by one, and finally connect the sections to be practiced into a complete set of movements. It is often used to memorize in stages to improve the quality of action. Each exercise can be divided into segments and continuous exercises. Cumulative practice: that is, from the first section, practice this section once alone, then practice it together with the previous sections, and then practice the whole set of movements in turn. It is often used to improve the cohesion of the whole set of actions and remember the actions. When practicing the first few knots, you can also practice in sections and continuously. Continuous practice: that is, the whole set of movements is completed continuously from the beginning to the last section. Often used when the movements are more skilled and the physical load increases. Disconnection exercise: that is, in the process of continuously completing a full set of movements, pause one or two movements and practice in stages. It is often used when the whole set of movements is basically familiar and individual movements are not well mastered, so as to strengthen the practice of a certain section. Repeated practice: practice two or eight beats before correcting each movement, and then repeat two or eight beats. It is often used when learning new movements or more complicated movements. Symmetry exercise method: that is, in an action, according to the left and right roads or the front and rear rows, symmetry exercises are carried out in the direction, position and method of the action. In order to improve the difficulty, interest and cooperation ability of practice, we often use symmetry methods: face to face, side to side, back to back, ups and downs, rotation and movement.