Coachella Valley High School math teacher Eddie Simoneau uses iPads with his students. Matt Hamilton/Coachella Valley Unified School District hide caption

itoggle caption Matt Hamilton/Coachella Valley Unified School District

The website has been linked to two bullying cases that led to suicides. Danny E. Martindale/Getty Images hide caption

itoggle caption Danny E. Martindale/Getty Images

Among families with children age 8 and under, ownership of tablet devices has jumped fivefold since 2011, reports the nonprofit Common Sense Media. Jeremy Hiebert/Flickr hide caption

itoggle caption Jeremy Hiebert/Flickr

Austin Newman, 10, of Menlo Park, Calif., is not allowed to play video games during the school week. His mother, Michelle DeWolf, says she had to take that step to keep her son focused on his homework during the week. Michelle DeWolf hide caption

itoggle caption Michelle DeWolf

Eva Hu-Stiles virtually interacts with her grandmother. iPad assist by Elise Hu-Stiles. John W. Poole/NPR hide caption

itoggle caption John W. Poole/NPR