The Contribution of Action Research to Develop Scientific Explanation Ability and Learning Achievement on Water Cycle in Grade 5 Using Model Based Learning

Abstract

     This research aimed 1) to compare scientific explanation ability on water cycle in Grade 5 using model based learning to pass the criteria of 70 percent and 2) to compare learning achievement on water cycle in Grade 5 using model based learning to pass the criteria of 70 percent. The target group consisted of 8 grade 5 students in the second semester of the academic year 2024 at Nongnakhamprachanukroh School, Khonkaen Province, from purposive sampling. This research was action research with 3 operational cycles. The research instruments were 1) 7 lesson plans, 2) a scientific explanation ability test, and 3) a science learning achievement test. The reflection tools all 3 cycles were observation form for assessing scientific explanation behaviors and a post-lesson reflection log. The data analysis statistics were means, standard deviations and percentages.
     The research findings revealed that: 1) Scientific explanation ability in the operational cycle 1-2, the average scores of all students were 41.67 and 53.13 percent, respectively, which did not pass the 70 percent criterion. In the operational cycle 3, the average scores of all students was 82.29 percent, which passed the 70 percent criterion. 2) Learning achievement in the operational cycle 1-2, the average scores of all students were 55.00 and 56.25 percent, respectively, which did not pass the 70 percent criterion. In the operational cycle 3, the average scores of all students was 77.50 percent, which passed the 70 percent criterion.