Tonjo, V., Wirjawan, J. and Untung, G. 2017. APPLICATION OF DIRECT INSTRUCTION WITH LABORATORY ACTIVITY TO IMPROVE STUDENTS’ PARTICIPATION AND LEARNING ACHIEVEMENT. PEOPLE: International Journal of Social Sciences. 3, 2 (Oct. 2017), 1276–1284. DOI:https://doi.org/10.20319/pijss.2017.32.12761284.