DENVER -- Do you know how many weapons were found at your child's school last year?

7NEWS Investigates has spent the past three months analyzing the issue of dangerous weapons in the metro area's 10 largest school districts.

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Weapons In Denver Public Schools Dangerous Weapons In Schools View Complete Statistics

7NEWS Investigator Tony Kovaleski looked at reports from more than 630 schools. The three schools with the most dangerous weapons are in the Denver Public School District.

Rishel Middle School had more weapons reports than any other school.

Tony Kovaleski/7NEWS: "More weapons than any other district in the area -- what does that say to you?"

Mike Hicks/DPS campus security: "Hopefully we can resolve the problem."

Hicks walks the halls and the sidewalks as a security officer in Denver Public Schools, a district that reported nearly 300 dangerous weapons incidents last year -- more than any of the Denver-area 10 largest school districts.

Ed Ray directs security for DPS.

"It's a cause for concern, obviously," Ray said.

"These weapons don't materialize in the schools. They come from the community," he said.

Our 7NEWS Investigation analyzed records from 631 schools in the Denver-area's 10 largest school districts.

We looked at reports of dangerous weapons. At the top of that list: Lake Middle School, Rishel Middle School and Montbello High School -- all schools in DPS.

"There's no failure here. There's no failure at Rishel. There's no failure at Montbello. There's no failure on the part of Lake Middle School. They're doing the best that they can," Ray said.

Montbello's 16 dangerous weapons reports are more than 76 other Denver-area high schools. They include a student who threatened a teacher using a two-by-four board with nails, and another student was caught on campus carrying a loaded "tech 9mm automatic weapon."

Lake Middle School also had 16 reports of dangerous weapons. But, it is Rishel Middle School that produced more dangerous weapons incidents than any other middle school.

In fact, the 31 reports of dangerous weapons are more than all 631 schools in our 10-district study.

Tony Kovaleski/7NEWS: "Are you embarrassed by this number?"

Sandra Just/Rishel principal: "I wouldn't say embarrassed. It certainly is a concern and it's something we're looking at."

The reports from Rishel show 14 students caught using or carrying knives, one student poking a teacher with a blood-drawing needle and one student carrying tear gas on campus.

Tony Kovaleski/7NEWS: "How do you explain 31 dangerous weapons in one year?"

Sandra Just/Rishel Principal: "I think it's because people are very aware. I think that any time an incident is reported, we very definitely take it serious."

Whatever you call it, the principal admits to making changes this year, and apparently they're working. For the current school year, Rishel has only one dangerous weapon incident.