Palle di carta accartocciate che volano a insegnante maschio spaventato in classe con lavagna sullo sfondo - Foto e immagini stock

Handsome male teacher holding glasses and looking at camera in maths class

Male teacher in formal wear writing equation on chalkboard in maths class

Male teacher sitting at desk, pointing finger in air and explaining equations in maths classroom

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

Female professor showing equations 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

Teacher pointing at equations in classroom with student

Female teacher in formal wear holding glasses and looking away in classroom

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

Female teacher standing in formalwear near chalkboard and holding glasses

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

Female teacher sitting at computer desk, holding glasses and having headache in class