Development of Rotating Machines on Fractional Materials for Grade III Elementary School Students

The purpose of this study was to develop a rotating jentera learning media for class III fractions at SDN Pondok Bahar 05. This research is included in and development (R & D). uses 4D model with four stages, namely: 1) define stage, 2) design 3) 4) disseminate stage. address object the experiment carried out by 30 third grade students elementary school. data collection expert validation questionnaire, material student response questionnaire. result product fractional materials. results got an average score 80% "valid" category. obtained 92.85% "very valid" responses based on field trials 97.92% which Based results, it can be concluded that very suitable used as medium mathematics