The research aimed to study the effects of social software application on constructivist classroom Characteristics. Applied research and descriptive - survey was conducted. The population consisted of all male and female teachers in the smart high schools that were selected by random sampling, 103 of them were selected as participants. The research's tool is scale of constructivist classes based on e-learning model Mvvdly and scale of social software applications. The reliability and validity of tools was calculated using the Cronbach's alpha and internal consistency. The method for data analysis, average fixed, correlation and regression analysis and structural equation modeling was conducted. The results showed that the use of social software and constructivist classroom Characteristics in the sample studied is higher than average. The use of social software and constructivist classroom Characteristics are taught positive and significant relationship. The results of regression analysis and path analysis showed that the use of the Internet and intranet affect on constructivist classroom Characteristics.