The research is motivated by the lack of ICT-based learning media, mathematics learning for elementary school children is still inductive, and lacks of good character attitudes. The purpose of this study was to develop realistic mathematics education mobile learning for elementary school students. The research method used ADDIE (Analyze, Design, Develop, Implement, and Evaluate). Based on the needs analysis, both students and teachers need a realistic learning media that can be represented through smartphone or tablet devices to support the learning. So, it is important to develop realistic mathematics education mobile learning. The product was validated by media experts, material experts, and practitioners. The results of expert validation get  percentage of  90% with  very good category for its performance, 92.5% with  very good category for the content competency. Furthermore, validation results from practitioners get 89% with very good categories. The realistic mathematics education mobile learning contains elements used in context, used of models, interactivity, students contribution, and interwoven. In addition, the media contained concrete images, videos, sounds, and questions that are arranged in online system. Based on these results it can be said that the realistic mathematics education mobile learning is valid for use.

The revolution of digital technology has major change on lifestyle, economics, entertainment, and education.In education sector, digital technology assists learners to learn something new rapidly.This paper purposes to potere digital technology in the form of mobile learning for primary students.This reasearch took primary students in one of the sub-urban schools in Semarang as the participants.This paper showed that millenials, in this case primary students, used gadget on any circumstance.They used their gadgets (smartphone and tablets) in learning and entertainment purposes.The students learned sciences, technology, and mathematics through mobile games, youtube, and social media.It indicates acceleration to upgrade human skills and knowledge.