1, with the help of students' existing life experience, let students communicate and cooperate in familiar life situations, and learn new time units and seconds independently, until 1 min =60 seconds.

2. Let the students experience a period of time through rich learning activities such as hands-on operation, and establish the time concepts of 1 second and 1 minute (60 seconds).

3. Experience the connection between mathematics and life, infiltrate the education of cherishing time, and educate students to cherish every minute.