W. Asmaranti, E. Retnowati
YouTube is very populer. Indeed, there are learning resources in the form of videos that can be found in YouTube. The purpose of this study is to describe whether these videos are useful for students. In this research, two students were given three new geometry problems to solve. The first student always watches Korean movies in YouTube, and the second one rarely watches such video in YouTube. They were asked to search relevant information in YouTube while trying to solve the geometry problems. Specifically, their reasoning ability is assessed including how they pose arguments, visualise a context, identify concepts, and conclude the solution. The results showed that after learning to use videos in YouTube, the reasoning abilities of the first student improved. Whereas the second student had difficulty using the searching bar in YouTube finding keywords so that the second student does not solve the given problem. It is concluded that learning using videos in YouTube is very helpful, but it is important to have sufficient knowledge on how videos in YouTube are searched and used. © 2019 IOP Publishing Ltd. All rights reserved.
Graduated Program of Mathematics Education, Yogyakarta State University, Indonesia; Mathematics Departement, Faculty of Mathematics and Science, Yogyakarta State University, Indonesia
