AbstractThe Ministry of Education Malaysia (MoE) has suggested using Flipped Classroom (FC) teaching method as an innovation in the teaching of additional mathematics especially in algebra. The suggestion of using FC is very much related to the concept of 21th Century Classroom that emphasizes good communication, collaboration, critical as well as creative thinking. This quasi-experimental research was carried out to determine the effects of FC on the motivation of students taking additional mathematics. Treatment group (n = 36) was treated with FC methods, whereas control group (n = 34) received conventional methods of learning additional mathematics. To control the difference in dependent variables, a pre-test was given before the experiment started. After nine weeks of treatment, both groups were given a post-test. The motivational questionaire on additional mathematics was used as a tool to collect the data. In determining the difference of data between treatment and control groups, the pr.....