They've seen too many of their friends and classmates fall victim to alcohol and drugs.
That's one reason students around the state are marking "red ribbon week" this week.
At MLS-Mohall High School, the senior class organized a week of activities focused on getting the message to younger students - a message telling them to steer clear of drugs and alcohol.
Today was "Red Out Day", where everyone was encouraged to wear red to broadcast the anti-drugs message.
Some of the seniors say they have first-hand knowledge that fellow students have given in to drugs or alcohol, and they want to take a stand.
(Gwendoline Denning, MLS-Mohall Senior) "I feel there are problems everywhere and it's best for everyone to know so we're starting in the elementary to let them grow up knowing it is bad for you."
(Mykal Smith, MLS-Mohall Senior) "When I look at the little kids I think of how scared I was at that age and they look up to us so we're sending the message that they need to stay away from drugs and alcohol and they're going to think that's a great thing to do."
(Chelsea Jordan, MLS-Mohall Senior) "I know a lot of people who have and we have some kids that might struggle with that here so it's a great thing to show them."
(Brenna Killensworth, MLS-Mohall Senior) "Just to get kids aware and involved - I mean drugs are bad of course and when you get kids involved in it and aware of what they can do it puts them in perspective of it."
Red Ribbon Week will continue tomorrow in Mohall as older students help younger kids make red ribbon bookmarks.