We developed two types of "sawing" teaching materials for observation. One was video type and the other was 3D internet (3Di) type. Developing the 3Di teaching material, we used a motion capture system and the virtual world: Second Life. As a result of the practices, 3Di type made students' "knowledge" and "interest" stronger than a teacher's performance in person and made students' "attitude" and "deepen students' knowledge" stronger than the video type materials.
