Bir tebeşir ve tahta ders (sığ Dof, renk tonlu görüntü sahip iken tahtada Kıdemli kimya profesörü yazma) - Stok Fotoğraf ve Görsel

Senior chemistry professor writing on the board while having a chalk and blackboard lecture

Senior chemistry professor writing on the board while having a chalk and blackboard lecture (shallow DOF, color toned image)

Senior chemistry professor writing on the board while having a chalk and blackboard lecture

Senior chemistry professor writing on the board while having a chalk and blackboard lecture

Senior chemistry professor writing on the board while having a chalk and blackboard lecture (shallow DOF, color toned image)

Senior chemistry professor writing on the board while having a chalk and blackboard lecture

Math teacher by the blackboard during mathclass - detail of the hand with chalk

Writing on chalk board

Math teacher by the blackboard during mathclass - detail of the hand with chalk

Math teacher drawing fuction graph on a blackboard during mathclass (motion blurred image)

Handsome college student solving a math problem during math class in front of the blackboard/chalkboard (color toned image)

Math teacher drawing fuction graph on a blackboard during mathclass (motion blurred image)

Senior math teacher teaching mathematics, writing on the blackboard during class

Senior male teacher teaching mathematics, writing on the blackboard

Blackboard with math lesson written on it

Math teacher drawing fuction graph on a blackboard during mathclass (motion blurred image)