Estudiantes de secundaria prestando atención en una clase, sentados en sus escritorios y notas de escritura, de vuelta al concepto escolar. - Foto e imagen de stock

High school students paying attention in a class, sitting in their desks and writing notes, back to school concept.

High school students paying attention in class, sitting in their desks and raising hands.

Group of Caucasian high school students taking an exam at classroom.

High school students paying attention in a class, sitting in their desks and writing notes, back to school concept.

High school students paying attention in a class, sitting in their desks and writing notes, back to school concept.

Three high school students at school learning, reading and writing into notebooks.

A portrait of group of university students sitting in classroom indoors, studying

A portrait of group of university students sitting in classroom indoors, studying

A portrait of group of university students sitting in classroom indoors, studying

A portrait of group of university students sitting in classroom indoors, studying

A portrait of multiethnic group of university students sitting in classroom indoors, studying.

A group of unrecognizable university students sitting in classroom indoors, studying.

A portrait of group of university students sitting in classroom indoors, studying