Double-Display Media in Geometrical Optics Learning in Vocational High School

This research is oriented on analysis of the impact of Double-Display media on Geometrical Optics learning used by students to improve students' learning outcomes and concept understanding. This research aims to determine the effectiveness of Double-Display media in Physics's subject Geometrical Optics. The effectiveness of Double-Display media as a learning tool is determined by the improving of students' learning outcomes and concept understanding. It is a quasy experimental research which is implemented in Vocational High School Islam Pajarakan class IX academic year 2017/2018 with a number of 36 people. Data collection techniques used in this research, are observation, tests, and documentation. The result showed that the use of Double-Display media in Geometrical Optics subject can improve learning outcomes by increasing the N-Gain score of 0.9 and it can be said as high category with the level of concept understanding of translation, interpretation and extrapolation are 97%, 86%, and 68%. Concluded the use of Double-Display Media on Geometrical Optics subject can increase students' learning outcomes and students' concept Understanding.