Samples used in research is student grade 1 school wise study found " Office of elementary education zone 2 zone 1 Tak semester 1 of academic year the student number 2557 (2014) rooms 25 people.
The samples used in this study were students at one school year Wise Faculty of Education meeting primary drying zone 2 Term 1, 2557 1 room of 25 students.
The sample is a grade school 1 WISE study found the office of Education 2 semester academic year exposed area 1 2557 number 1 room. The number of students 25 people.