Adults who went undercover at a high school found 7 things people don't realize about life for teenagers today

• On A&E's documentary series "Undercover High," seven adults posed as students for a semester in a Kansas high school.
• Some had only graduated five years ago, and they still saw many differences in what daily life is like for high-schoolers today.
• Cell phone use is rampant - and dangerous. Teachers have less control than ever. But kids still just want someone to talk to.

High school is nothing like it used to be.

That's the message of "Undercover High," a documentary series on A&E that follows seven adults who pose as students for a whole semester at Highland Park High School in Topeka, Kansas.

The undercover students, aged 21 to 26 when the show was filmed last year, took classes, joined clubs, and saw firsthand the struggles teenagers go through in their everyday lives. Even for the participants who graduated as little as five years ago, their return to high school was completely different than their first time around.

Here are a few seven things the undercover students learned about high-schoolers that most adults don't realize: