<![CDATA[Abstract : Development of Android-Based Learning Media Applications on Atomic Structure Material for Class X SMA/MA. Android-based learning media application is one of the innovations in the world of education. This product was developed to meet the needs of teachers and students in learning. This study aims to develop an android-based learning media application on Atomic Structure material for class X SMA/MA that is valid and practical. This research is a development research which is carried out by using the Plomp development model which is limited to the prototyping phase for practicality testing in small group evaluations. The research was carried out at FMIPA UNP, FT UNP, and SMAN 8 Padang. Product validation is carried out by material experts and media experts. Product practicality assessment was carried out by 2 chemistry teachers and 12 students for small group trials. The validity analysis technique used the Aiken's V index and the practicality analysis technique used the percentage formula. The results showed that the developed Android-based learning media application was classified as valid (obtained an average value of V, namely 0.939 for material experts and 0.959 for media experts) and the practicality test results in small groups were classified as very practical (obtained a practicality percentage value of 94% for teacher practicality test and 93% for student practicality test).]]>
