Adolescentes que participan en una conferencia modelo de las Naciones Unidas, centrada en un debate. - Foto e imágenes de stock

Portrait of teenage girls and boy in white shirts during lesson in classroom

Pretty Caucasian woman teacher standing by the board and giving a lecture.

Schoolboy holding pen near notebook and blurred multiethnic pupils

Business people working at modern office

Multiethnic fashionable magazine editors working with color palette in modern office

Schoolboy holding pen near notebook and blurred multiethnic pupils

Cheerful student looking at curly friend sitting with pen in classroom

Smiling schoolboy pointing at notebook near friend in classroom

Smiling woman pointing at african american student standing near blurred whiteboard

Smiling schoolgirl looking away near laptop and blurred classmates

Teen schoolgirl holding digital tablet and talking to blurred african american teacher in class

Side view of attractive and bi-racial student in apartment

African american teacher holding digital tablet while talking to teen schoolboys in classroom