The purposes of this research were: 1) to study the efficiency of  4 MAT approach lesson plans of mathematics on addition, subtraction, multiplication and division combined at the criterion 80/80, 2) to find the students learning achievement after using these lesson plans, 3) to find the effectiveness index of 4 MAT learning activity management and 4) to study the students satisfaction toward learning by using 4 MAT learning activity. The subjects were 22 Prathomsuksa 3 students of Wat Nongsue school in semester 2 academic year 2010. The instruments used in this research were 4 MAT approach lesson plans, pretest and posttests and a questionnaire. The statistics used for the data analysis were percentage, mean, standard deviation and t-test
The results of this study revealed that:
 	1. The efficiency of 4 MAT approach lesson plans was 87.19/83.63 that was higher than the criterion 80/80. 
 	2. The students learning achievement after using these lesson plans was statistically significant higher than before using at .05.
3. The effectiveness index of 4 MAT learning activities was at 0.77.
4. The students satisfaction toward learning by using 4 MAT learning activities was at the highest level and the mean was 4.81.
