This study aims to investigate to what factors of classroom environments effect on the thoughtfulness in social studies. To fulfil the research purpose, I analysed the relevant empirical studies, focusing on the three main areas; 1) characters and teaching styles of teachers, 2) instruction models and teaching strategies, 3) the classroom contexts. In Conclusion, I posited seven arguments about the factors of classroom environments to make the social studies classroom thoughtfully. 1) Teachers are fully aware of impotance that the critical purpose of the social studies is to develope the higher-order thinking. 2) Teachers have the open-hearted intellectually. 3) Teachers provide his students with the higher-cognitive question. 4) Teachers expect that all of his students will have the higher-order thinking. 5) The good instruction models to develope the higher-order thinking are inquiry, decision-making, and discussion model. 6) The good instruction structure develope the higher-order thinking is cooperative. 7) The various media is an incitement to think.