Abstract
The authors report an introductory course of computer programming for junior high students. The theme is game programming, which is familiar to them. Scratch is adopted as the programming environment because it is easily approachable. Enrolled students cooperated as mentors. The first half of the course is the lecture of introduction to programming and basics of Scratch programming. The latter half is practice of game programming under instruction of mentors. The courses have been carried out in 2013 and 2014. Most the students taking the course are satisfied with the course. Improvement of the contents of the course and efficiency of operation based on the feedback are current issues.
