That number is a little higher in Michigan. Nearly two out of five students will be self medicating in Michigan high schools this year.

It's no surprise to their classmates either: 86% say they know the 2.8 million who are abusing substances during the day.

Here are some factors that can increase substance abuse, according to the survey.

According to the National Center on Addiction and Substance Abuse here are some triggers. Peer pressure,public schools and now private schools, parental involvement and faith. Just to name a few.

The survey found that 44% of high school students know a classmate who sells drugs at school, and 60% say that drugs are available on campus. Marijuana was the most-sold on school grounds, students said, as well as prescription drugs, cocaine and ecstasy.

How could schools and families try to stop this from happening?