Investigating the Effect of the group Teaching Method on Simultaneous Learning of Common Topics with Different Complexity Levels on Students Learning in Multigrade Classes

The purpose of this research is to investigate the effect of simultaneous teaching of common subjects with different levels of complexity in multigrade classes of villages in Sardasht region of West Azarbaijan province and compare it with method of teaching to different bases independently.
Our research method is a pre-post test Quasi-experimental design with control group. The statistical population of the study consisted of all villages with multistage class in Sardasht city. Two of them were selected by means of two-stage cluster sampling method, two qualified multiplyclass classes were selected as the sample. The research data were collected through a researchermade test whose validity has been verified by specialist subject-approved subjects. The reliability of the test was also calculated by Spearman correlation of 0.86To analyze the statistical data, descriptive statistics, including mean and standard deviation, and inferential statistics of multivariate covariance analysis were used.
Finding: The findings of the quantitative data show a significant difference between the results of the control and experiment group and the research hypothesis "Learning the trained students through the simultaneous teaching of common subjects with varying complexity in different bases from the learning of trained students by method Independent education is more on any basis "is confirmed.