S. S. Panggabean, H. Pranoto, dan A. Y. LumbanGaol, “THE EFFECTIVENESS OF THE ACTIVE LEARNING STRATEGY OF THE FIRING LINE TYPE IS VARIED WITH MEANINGFUL SCRIPT ON RESULTS AND ACTIVITY OF STUDENT LEARNING MATERIALS ON HUMAN REPRODUCTIVE SYSTEM IN CLASS XI IPA SMA PARULIAN 1 MEDAN”, Jurnal Pelita Pendidikan, vol. 5, no. 2, Jun 2017.