Profesor masculino en la ecuación formal de escritura de desgaste en pizarra en la clase de matemáticas - Foto e imágenes de stock

Male teacher in formal wear wiping mathematical equations with sponge in classroom

Male teacher wiping mathematical equations with sponge from chalkboard in classroom

Cropped view of male student wiping mathematical equations with sponge in classroom

Crumpled paper balls flying at frightened female teacher in classroom with chalkboard on background

Female professor showing equations in classroom

Female teacher looking at camera and pointing with finger at mathematical equation on chalkboard in class

Teacher pointing at equations in classroom with student

Female teacher in glasses sitting at desk and pointing at laptop with blank screen in classroom

Beautiful pensive female teacher in formal wear and glasses in classroom

Beautiful young teacher writing with chalk on blackboard

Partial view of female teacher writing equation on green chalkboard