visual aids; visual teaching materials
Refers to educational materials that rely on visual elements, such as charts, pictures, videos, or slides, used in classrooms or presentations.
The teacher uses many visual aids in class.
This visual teaching material explains historical events in an easy-to-understand way.
視覚教材 is the full Japanese term for visual aids, while ＶＡ is the shorthand used in educational settings.
Compound of 視覚 (shikaku, 'visual sense') and 教材 (kyōzai, 'teaching materials'). The exact historical derivation is uncertain, but the term is a straightforward modern compound.