Chica adolescente grave sentado en el suelo y hablando en el teléfono inteligente, mientras que los amigos que utilizan el ordenador portátil detrás - Foto e imágenes de stock

Smiling teenage girl sitting on floor and using smartphone with friends using laptop behind

Smiling woman with digital tablet talking to blurred friend in classroom

Young multiethnic students doing homework together

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

CPR class with male instructor speaking and demonstrating help, giving lessons of first aid. compression and resuscitation procedures. Cpr mannequin is used for an example

Group of schoolchildren bullying sad girl with smartphone

Serious father looking at little daughter holding smartphone at home

Beautiful businesswoman using digital tablet while sitting on armchair in office

Smiling young african american woman using laptop and talking on smartphone at home

Casual homosexual couple counting their expenses while sitting on sofa at home

Grandfather with book and grandchild with smartphone sitting on sofa isolated on white

Front view of frustraited african american couple beside couch at home

Attractive businesswoman using digital tablet while sitting on armchair in office

Casual upset man sitting in thoughtful pose on sofa at home