Bolas de papel amassadas voando em assustado professor masculino em sala de aula com quadro-negro no fundo - Banco de fotos e imagens

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

Smiling male teacher in formal wear holding wooden pointer in front of chalkboard with equations

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

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

Female teacher with wooden pointer explaining mathematical equations in classroom

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

Smiling female teacher with wooden pointer explaining mathematical equations in classroom

Female teacher standing in formalwear near chalkboard and holding glasses

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

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

Cropped view of female teacher with wooden pointer explaining mathematical equations in classroom

Beautiful female teacher with wooden pointer explaining mathematical equations in classroom