Development of Mathematical Problem Solving and Reasoning Abilities “Addition, Subtraction, Multiplication, Division decimal” by Learning Emphasized Heuristics Thinking with Numbered Heads Together of Primary 6 students at Wattalaybok School (Luangpor Beaw – Sutabud Uppatham)

Abstract

The research aimed to: 1) compare the learning achievements in mathematics before and after learning emphasized heuristics thinking with numbered heads together and the achievement after learning with 70 percent criterion  2) compare the problem solving abilities of students after learning emphasized heuristics thinking with numbered heads together with 70 percent criterion 3) compare the mathematical reasoning abilities of students after learning emphasized heuristics thinking with numbered heads together with 70 percent criterion and 4) study the satisfaction of the students towards the learning emphasized heuristics thinking with numbered heads together. The statistics used for data analysis were: mean, percentage, standard deviation, t-test for dependent samples and t-test for one sample. The sample group consisted of 20sixth-grade students at Wattalaybok School (Luangpor Beaw – Sutabud Uppatham), derived by cluster random sampling. The research instruments were: 1) lesson plans 2) an achievement test 3) an ability test on problem solving and mathematical reasoning abilities and 4) a satisfaction assessment form. The results showed that: 1) the students’ learning achievement after learning emphasized heuristics thinking with numbered heads together was higher than that of before and then 70 percent criterion with statistical significance at .05  2) the students’ problem solving after learning was higher than 70 percent criterion at significant level .05 3) the students’ mathematical reasoning ability after learning was higher than 70 percent criterion at significant level .05 and 4) the level of satisfaction from the student as a whole was the highest level.