Abstract
This article reports the efforts being made toward creating teaching material for use in a training course for Japanese Volunteers. This teaching material is aimed at improving problem-solving abilities and power to handle class structures. As part of preparation, first, keywords were extracted on the basis of the teaching material concept set on 21st century skills. Next, we suggested activities to help learn the keyword concepts. After examining the structure of the teaching material, a tentative version was prepared and given to three Japanese Volunteers. Based on their comments, the final version was created.
