Student learning engagement is a key factor in the success of Indonesian language instruction at the elementary school level; however, students' participation in classroom learning remains relatively low. This classroom action research aimed to describe the improvement of students' learning engagement and cognitive learning outcomes through the implementation of a discussion method supported by the Wildlife Detective learning media in descriptive text lessons. The study employed the Kemmis and McTaggart spiral model and was conducted in two cycles from March to April 2026, involving 28 third-grade students at SDN Karangbesuki 1 Malang. Data were collected using structured observation sheets to assess learning engagement and achievement tests to measure cognitive learning outcomes, and were analyzed descriptively using quantitative methods. The findings revealed that students' average learning engagement increased from 48.8% in the pre-cycle to 73.8% in Cycle I and reached 91.5% in Cycle II. Likewise, learning mastery improved from 42.9% to 96.4% at the end of Cycle II, exceeding the school's Minimum Learning Achievement Criteria (KKTP) of 70. Improvements in group role allocation and the refinement of learning media implementation during Cycle II further enhanced instructional effectiveness. Therefore, the discussion method supported by the Wildlife Detective learning media was proven effective in improving students' learning engagement and cognitive learning outcomes and can serve as an innovative instructional alternative for Indonesian language learning in elementary schools