Bir adam bir kara tahta üzerinde mutlu sözcüğü siler - Stok Çekim ve Video

The word "past" written with chalk on the blackboard is erased by a man's hand with a wet sponge , conceptual footage about forgetting the past and concentrating on the future

Macro of woman hand holding piece of chalk. Closeup unrecognizable female person writing math simple equation on chalkboard. Student solving mathematical example on blackboard. Study concept

Ecology text animation on blackboard

Teacher writing Lesson one on school blackboard

A macro shot of fingers picking up a piece of chalk and drawing on a blackboard