PENGEMBANGAN MEDIA PRESENTASI VISUAL DENGAN PENDEKATAN KONTEKSTUAL DALAM PEMBELAJARAN MATEMATIKA DI SMP

Education is currently experiencing rapid technological developments, especially mobile phones and mobile device ownership is increasing. For that we need a mathematics learning media that is operated on a computer or laptop with windows operating system can also be operated on the android device. This study aims to develop learning media mathematics powerpoint for android. The method used by ADDIE. (1) Analyze, student needs analysis shows students need learning media. (2) Design, the product produced in this research visual presentation media powerpoint for android. (3) Development, media developed then validated by 89% media experts and material experts 84% so it is said to be valid. (4) Implementation, student responses in class VIII C achievement level 88% are in the practical category. (5) Evaluation, the data in this study consists of preliminary data in the form of values obtained through daily test scores. The final data is the value obtained through posttest. The result of posttest of both classes was tested equality of two average (right-t test) got α = 0,05 obtained t_tabel = 1,66 and t_hitung = 3,589 (t_count> t) _table 3,589> 1,66 then conclusion H0 refused . So it is concluded that the development of visual presentation media powerpoint for android with a valid contextual approach is used and effective and practical rather than the scientific approach to mathematics learning in junior high.