Teacher's Strategy in Increasing Student Learning Activeness in Natural and Social Studies Subjects. One of the problems in learning Natural and Social Sciences (Natural and Social Sciences) in elementary schools is the lack of student activity in participating in learning. This study aims to explore the most appropriate learning strategies used by teachers to increase student learning activeness. This student learning activity needs to be increased to improve student learning outcomes so that student learning objectives can be achieved optimally. The teacher's strategy used must be able to lure students to understand learning optimally and be able to participate actively in the learning process, unlike conventional lecture-based learning which tends to make students passive and feel boring. The strategy that can be used in science and social learning is the application of the discovery learning model and the Think-Talk-Write cooperative learning model which can require students not to be able to construct their own thoughts, remember material more firmly, convey the results of their thoughts, and implement them in life in nature. as well as social. This learning model is able to increase student effectiveness so that it can support the achievement of optimal learning outcomes.