By Marcy Norton

PHILADELPHIA (CBS) — Students at Imhotep Institute Charter High School got a lesson about their future Tuesday and about how they can be safer online.

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Uniformed 10th graders sat in rows in the cafeteria joking and laughing before the assembly, but the topic was no joke. Ameer Blackmon of the Pennsylvania State Attorney General’s Office says kids this age sometimes don’t think ahead when it comes to online activity.

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“We don’t notice that the things we do today are going to affect us for years and years down the road, especially when we’re talking about the internet and how once you put something online, it’s there forever and it kind of lives on and on,” said Blackmon.

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He talked to students about how their online posting can be turned against them by cyberbullies or even predators and how some angry words or photos you post now, could cost you a scholarship, or even a job, down the road.