THE EFFECT OF ACTIVE LEARNING TOWARDS LEARNING ACHIEVEMENT AND MATHEMATICAL PROBLEM SOLVING ABILITY ON TRIGONOMETRY OF MATTHAYOM SUKSA 3 STUDENTS

The purposes of this research were to study students’ learning achievement on trigonometry and
to study students’ mathematical problem solving ability on trigonometry after receiving active learning.
The sample of this research were 45 students in Matthayom Suksa 3 during the second semester of
the academic year 2021 from Suankularb Wittayalai Thonburi School. They were selected by cluster
sampling method. The research instruments consisted of lesson plans using active learning, mathematical
learning achievement test and mathematical problem solving ability test on trigonometry. The data were
analyzed by using percentage, mean, standard deviation and t-test for one sample. The results of this
research found that the students’ learning achievement on trigonometry after receiving active learning was
higher than 70 percent criterion at .05 level of significance, and the students’ mathematical problem solving
ability on trigonometry after receiving active learning was higher than 70 percent criterion at .05 level of
significance.