The purpose of this study was to increase the learning outcomes of IPA in the Ecosystem Balance mate-rial through the application of the Contextual Teaching And Learning (CTL) learning model for class VI students of SD Negeri 1 Manggeng for the 2017/2018 academic year. The research methodology is Classroom Action Research (CAR) consisting of two cycles and each cycle consisting of two findings. Each cycle consists of planning, implementing, observing and reflecting. The data collection technique is to collect test scores that are carried out at the end of each lesson in each cycle using a question in-strument (written test). The learning outcome data were analyzed by means of percentage statistics. The results showed that the completeness of student learning outcomes increased from 66,67% in the first cycle and increased to 83,33% in the second cycle. The application of the Contextual Teaching And Learning (CTL) learning model can increase the learning outcomes of IPA in the Ecosystem Balance material of class VI SD Negeri 1 Manggeng for the 2017/2018 academic year
