This is a rush transcript from "Hannity," February 10, 2014. This copy may not be in its final form and may be updated.
SEAN HANNITY, HOST: Welcome back to "Hannity." Students in Colorado high schools have found a new way to smoke marijuana in class without getting caught by the smell of the smoke. They are now using vapor pens which are similar to e-cigarettes and can be purchased in the grocery store for around $25. The pens have capsules with the weed in them that literally melt the plastic and then cook the substance. However, they emit no smell when they're used. One school where this has become a bit of a problem is Lakewood High School in Colorado. And the principal of that high school, Ronald Castagna, is with us, and he joins us now. Sir, welcome to the program.
RONALD CASTAGNA, LAKEWOOD HIGH SCHOOL PRINCIPAL: Good evening, Sean. Quick correction, not a big problem because our teachers know what to look for. This is awareness for parents.
CASTAGNA: This is awareness -- they need to know what to look for. So I'm not going to have our schools bashed because we busted 5,000, in 2009-10 there were 5,000 reports from schools on marijuana use. Our teachers are doing a great job. What we've got here is an industry that's out of control. And the reason why this came to my attention is because kids were sitting down the block smoking in their cars and then going into their own homes.
HANNITY: Let me assure you, principal, I am not here to bash you. I'm here to help educate parents.
HANNITY: But it is a problem
CASTAGNA: It's not a big problem at Lakewood High School because our teachers know what to look for.
HANNITY: OK, understood. I understand they know what to look for, but many schools don't know what to look for.
HANNITY: And this is far more widespread than people know.
HANNITY: All right, we're on the same page. I want to stop it -- so literally a kid can be in class, just to be clear, with this special pen, and they could be getting high and right in front of the teacher, right in class and nobody would know.
CASTAGNA: That is potential. This is a fountain pen that I've had as a collector and this is what a vapor pen looks like --
HANNITY: You've collecting pot pens, principal? I'm kidding. It was a joke. I'm teasing.
Alright, go ahead. Show it again, because I want people to see it.
CASTAGNA: OK. Regular pen. Vapor pen. Pencil -- they've decorated them. They make them look nice, very, every day, kind of use. You want to hide your pot from parents in their home. You take your Dr. Pepper can here, lid comes off. Nice place to hide it. It just looks like a regular can of pop. These are so sophisticated. This one is pricey. This one is $59. You can charge it and put it in your USB and put it on your computer and be charging your vapor pen at the same time. Parents need to know what to look for.
HANNITY: Short of your school, what percentage of schools -- not just in Colorado but around the country -- how aware are the kids of this new technology? How widespread has your experience tell you that this is?
CASTAGNA: Well, it's just like anything else. I think our schools are catching on before parents catch on. And they're working on it. 46,000 students surveyed. We've got more kids since medical marijuana has taken hold in Colorado. We've got more kids stealing their parents' stash, selling it easier --
HANNITY: It's not just medical. It's now legal in Colorado and legal Washington. It's legal in your state, now.
CASTAGNA: Right. And now we're waiting to, for that to flow into our schools as well and into our communities and into our homes.
HANNITY: All right, I think, by the way, you're doing a great job. A lot of schools may not be aware of this or the extent that it's being used. And it's very informative and I think parents need to know. So principal, thank you for being with us. And keep up the good work. I wish more people were paying attention like you were. Thank you.
CASTAGNA: All right, thank you.
Content and Programming Copyright 2014 Fox News Network, LLC. ALL RIGHTS RESERVED. Copyright 2014 CQ-Roll Call, Inc. All materials herein are protected by United States copyright law and may not be reproduced, distributed, transmitted, displayed, published or broadcast without the prior written permission of CQ-Roll Call. You may not alter or remove any trademark, copyright or other notice from copies of the content.