Control variables: Students in High School Science - Mathematics a student with a 5/1-5/3 at 0.5 m / 1 m 39 have a 5/2 = 30 and m 5 /. 1 of 31, totaling 100 people.
The control variable: students high school-class of science-Math. 1/5-5/m/3, with access to all the students to search for a 5/1. Number of rooms 5 m/39 of 2 people 30 people and 5 m/1 of 31 people, including end of 100 people.
control variables: high school students call Mr. Chuwit-coprocessor, M5 / 1- 5 /3 by a student, M5 /1 number of rooms: 39 M5 / 2 total 30 persons, and the M5 /1 total number of 31 100 people.