Pornpid Si tea words [2548] study instructional activities using the model. Mathematics in solving problems for the students 3 by activities that use.From operating activities. Starting from understanding the situation problems, the concept of instead, problem situation with mathematical model. Find out the mathematical results from model.As the guide and facilitate in practice activities. Circulate to see the activities of The students in various groups use questions encourages students and introduced as necessary. The results showed that the students of grade 3.Can pass criteria are more than 50 percent of students. At the level of significance.01 and grade 3 learning activities used mathematical model to solve the attitude toward mathematics achievement after than before the class. At the level of significance. 01
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