Young teacher teaching complicated equations

Young teacher dressed in a suit, teaching advanced calculus equations on a blackboard, then looks at the camera and smiles.

Scientist student solving formulas on a blackboard

Young female science student in a robe writing formulas on a whiteboard, while turning around and smiling directly at the camera.

Person drawing a large question mark with chalk on a blackboard

Analyzing equations written on a blackboard

Man dressed in a suit watching and analyzing equations written on a blackboard in front of him. Teacher checking the blackboard at school.

Person draws colourful question marks on a blackboard with chalk

Teacher explaining mathematical formulas

Young teacher dressed in a suit and glasses, explaining mathematical formulas on a blackboard, as he approaches the shot and smiles friendly.

Teacher smiling in front of a blackboard

Young teacher with a ponytail, smiling with her arms on her belly, as she takes them away, and in the background an unfocused blackboard with mathematical formulas.

Man writing a chemical formula on the blackboard

Engineer looking over plans on a board

Child hand writes 'Peace Not War' on blackboard

Hand writes 'Happy Teacher's Day' message on chalkboard

Hand writing 'Idea' on a blackboard

Chemical model on the blackboard

Solving an equation

Hand writes 'success' on a blackboard with chalk

Two people discussing a project

Math teacher writing a formula on blackboard

Person drawing a rainbow and the seasons on a blackboard

Writing success on a board

Man smiling by a blackboard

Hand writes 'Teamwork' in block letters on a blackboard

Team working on a blackboard

Young students copying the blackboard in a classroom

Young male and female students facing each other, sitting in armchairs in a classroom while copying the blackboard into their notebooks and taking it slowly goes from side to side.

Algebra class, blackboard view