New statistics released on Friday shed light on how cyber bullying affects Chicago Public School students.

At the end of 2010, the non-profit group Mikva Challenge surveyed 700 CPS students. The data show one in three respondents admitted to being cyber bullied, while more than third say they have participated in cyber bullying.

Miriam Martinez, director of the student-run education council at Mikva Challenge, said teachers need help from parents to make sure students are aware of the repercussions that can come with social media.

“Parents, check what your child is doing at home. If they’re online or in front of a computer for hours, what are they doing?” said Martinez. “We’re not always checking up on that. Are they doing homework or are they on Facebook?”