This research aims to find out the effect of the use of documentary films on students learning outcomes in the material of the scope of biology class X State Senior High School 1 Sengah Temila. This was Quasi Experimental research with a Nonequivalent Control Group Design. The sampling technique was intact group. The samples were students of class XE as an experimental group instructed using documentary films and the students of class XF as the control group instructed using the power point presentations. The instrument was in the form of a multiple choice test consisting of 20 items. The result of the average score in post-test experiment group was 15,22, while the average score students post-test in the control group was 13,76. From the Mann-Whitney U test, it was obtained that Zcount < Ztable (-2,17 < -1,96), meaning that there was a significant difference between the students learning outcomes in the experiment and control. Throught an Effect Size calculation, documentary films had an effect of 19,15% on learning outcomes of the students
