To use project-based teaching to develop problem-solving competence for students through experiential activities in teaching 2nd grade Nature and Society, we have determined that the principles of choosing the content and goals of experiential activities include the following steps: (1) Determine the goal of the activities, (2) ) Determine the content, means, methods and forms of the activities
(3) Make detailed plans for activities
(4) Organize experiential activities
(5) Summary evaluation of activities. The results of pedagogical experiments confirm the effectiveness of developing problem-solving competence of 2nd graders in studying Nature and Society through experiential activities according to the proposed process.