Free image/jpeg, Resolution: 235x235, File size: 16Kb, Green school board with chalk on a tripod N2 picture with tags: Blackboard, Communication, Concepts, Education, Construction Frame, Human Hand, Advice, Vector, White, No People, School, University, Teaching, Man Made Object, Empty, Single Object, Wood - Material, Classroom, Sign, Symbol, Text, Writing, Information Medium, Illustration, Textu
