在这一步骤中，主要是学生的自学以及小组成员之间的合作学习。任务分配完成

In this step, it is mainly students' self-study and cooperative learning among group members. After the assignment of tasks is completed, the first thing is for students to look up data, collect information and sort them out. Then the team members share their results, have discussions, and finally find the best solution to the problem. During student discussion, teachers should answer questions to students when necessary

In this step, it is mainly self-study by students and cooperative learning among team members. After the assignment is completed, the first step is for the students to consult the information, collect information and organize it. The team members then share their results, discuss them, and finally find the best solution to the problem. During the students' discussion, the teacher should answer the questions and puzzles to the students when necessary

In this step, it is mainly students' self-study and cooperative learning among group members. After the task assignment is completed, the first thing is for the students to look up the data, collect information and sort out. Then the team members share their achievements, discuss and finally find the best solution to the problem. During the students' discussion, teachers should answer their questions when necessary