The fact that students nowadays are millennial generation who were born with a gadget in their hands forces the teachers and education institutes to adapt their education system with technology. By using internet, gadget, and computer programs, teachers now can be more innovative in teaching, managing materials, collaborating, initiating discussion, and doing more interactive learning activity with the students. The tool of doing those things is called Learning Management System (LMS). The learning process using Learning Management System can be done anywhere and anytime since it all can be accessed using a student computer or gadget connected to the internet network. The examples of mostly used LMS are Moodle, Google Classroom, and ATutor. This study aims to discover the use of the implementation of Google Classroom in learning activity especially in holding a class discussion. Through two cycles of Classroom Action Research in SMA PENABUR Bogor, the researcher found that Google Classroom is considered as one of LMSs that is suitable in holding a class discussion.