shikaku kyōzai
1. visual aids
Noun
1. visual aids
1. teaching materials
1. square; rectangular
1. qualifications; requirements
1. unqualified; unlicensed
1. (sense of) sight; eyesight
1. square
1. quadrilateral; square
1. Was textbook.; Was teaching material.
1. Probably the textbook.; It's likely the material.