This research is motivated by the low learning activeness of fourth-grade students at SDN Tanjungrejo 1, characterized by students frequently walking around the classroom and engaging in conversations unrelated to the lesson. Only approximately 25.9% of students were able to sit quietly and focus on learning. This condition resulted in low learning outcomes, with average scores of 62.5 in IPAS and 63.0 in Indonesian Language, both below the learning mastery criterion (KKTP) of 75. This study aims to improve student activeness and learning outcomes through the application of deep learning-oriented group discussion strategies in IPAS (Cultural Diversity chapter) and Indonesian Language (Origins of the Indonesian People). This Classroom Action Research (PTK) was conducted in two cycles involving 27 fourth-grade students. Results showed that the average IPAS score increased from 79.00 (Cycle I) to 93.30 (Cycle II), while Indonesian Language scores rose from 79.37 to 94.78. The mastery rate improved from 81.5% in Cycle I to 100% in Cycle II. It is concluded that the deep learning-oriented group discussion strategy effectively improves the activeness and learning outcomes of fourth-grade students at SDN Tanjungrejo 1.
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