Table 3 reveals that the school system before and after thinking through teaching and learning model to development of system thinking. Have a grade point average and standard deviation, respectively, as follows: Test scores before students The average value (X ̅), standard deviation (S.D.) 33.31 6.22 and later studied test scores. The average value (X ̅) 61.26 The standard deviation (S.D.) 4.32 when compared the differences between the averages found that thinking of students after school by teaching to develop more advanced systems thinking, before studying statistical significant level of .01.
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