INCREASING STUDENT LEARNING ACHIEVEMENT IN ENGLISH SUBJECTS USING THE GROUP INVESTIGATION METHOD IN CLASS VII UPTD SMP NEGERI 6 SINJAI. teflo [Internet]. 2022 Dec. 25 [cited 2025 Feb. 5];10(3):366-74. Available from: https://journals.ukitoraja.ac.id/index.php/ojtefl/article/view/2402