The writing and speaking course was designed by the Korean Broadcasting System (KBS), and tests were conducted on a total of 21
occasions; testing required 2 h per dayand was conducted over a period of 2 months. A follow-up examination was subsequently performed.
The experimental group participated in the course with the game content, whereas the control group participated in a general course that
followed the same procedure but had nothing to do with the game or gaming. Therefore, all participants were taught in the same way,
although the content differed