The population used in this research as a student year 4 semester 1. School year school 2557 Nong na Kham wittayakom school education area Office School District 25. From the classroom students 130 people.
The population in this research is the students' first semester of a four -year school in 2557 Nong Na sciences. Secondary Educational Service Area Office, District 25 students from four classes of 130 people.