The aims of this research were: 1) to study the problem-solving ability of the students before and after the completion of the course; 2) to compare their learning achievement before and after the completion of the course; 3) to study the student satisfaction with the problem based learning management with the graphic organizer structure diagram of 32 first year students, majoring in Social Work in GE 1001 course ‘Anti-corruption’, Semester 1, 2018 in Mahamakut Buddhist University, Isan Campus. The research tools were: the test of problem-solving measurement (20 items with 4 multiple choices) and with its reliability value (KR-20) of 0.87; a test of learning achievement (30 items with 4 multiple choices) with its reliability value of 0.88; a five rating scales satisfaction test (30 items), with its reliability value of 0.97, created in accordance with the Likert method. The statistics used in data analysis were: Percentage, Mean, Standard Deviation and Paired t-test.

The research results were as follows:

1) The mean score of the problem-solving ability of the students after the completion of the course utilizing the problem based learning management with the graphic organizer structure diagram was higher than that of the pre-study (post =16.78, pre = 8.15) with the statistical significance level of 0.01.

2) Based on the comparison, the mean score of achievement of the problem based learning by utilizing the graphic organizer structure diagram after completing the course was higher than that of the pre-study (post = 26.06, pre = 1 3.65) so the statistical scores were different at the statistical significance level of 0.01.

3) The mean score of the student satisfaction with the problem based learning management with the graphic organizer structure diagram in overall was rated at a high level as same as those of the studied aspects. The highest score can be seen in the aspect of ‘learning activity management’, followed by ‘media and innovation’ and ‘measurement and evaluation’.

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