This study explores the impact of an action-oriented environmental education course on students' environmental awareness, with 53 college students divided into experimental (N = 27) and control (N = 26) groups. Both groups participated in similar learning activities; however, the experimental group further recorded the amount of waste discharged into the environment by people around them for one and a half months (2 days/week). Students in the experimental group showed a significant difference in six of seven environmental awareness dimensions after this course. These results confirm that an action-oriented environmental education course has a positive effect on changing an individual's awareness of the environment.