school shooting is a RARE occurrence. To think it's everywhere and common... that is the sign of paranoia. Same thing about avoiding malls cuz of shooting. Both shootings at malls and schools are RARE in USA.
It's true shootings are rare, but I think Maria is probably talking in terms of the tallyup over the years.
I've done univ. research on this topic before in college, school shootings in the USA have grown exponentially especially since the year 2000. I don't have the report data that I typed up on hand, I lost it in a laptop HD crash, but I do remember there were some good sources immediately available on the net.
Let me see..
Here you go:
Timeline of School Shootings - US News and World Report
Converting this to statistical data, you have:
2008: 7 instances
2007: 7 instances
2006: 5 instances
2005: 2 instances
2003: 2 instances
2002: 2 instances
2001: 1 instance
2000: 4 instances
--After Columbine incident, it was the first major landmark in school shootings. Many measures in law were quickly passed to prevent things like this from happening in the future, from panicked people--
1999: 2 instances (Columbine instance <- major coverage)
1998: 5 instances
1997: 4 instances
1996: 2 instances
1995: 0 instances
1994: 1 instance
1993-1992: 0 instances
1991: 1 instance
1990: 0 instance
1989-1987: 0 instances
1986: 1 instance
1985: 2 instances
From this you can easily conclude:
2000-2008: 30
1990-1999: 15
1980-1989: 03
Using statistical math to check the numbers:
80's to 90's: 400% increase
90's to 00's (note 2000 decade isn't over yet): 100%
80's to 00's: 900% increase
It's easy to deduce, there is some reason for the sudden surge in school shootings - motives vary from expert to expert, but one thing's for certain - they will still happen.
edit: Note - these are only documented coverage, I remember reading though a lot of them. During my research, I recall there are often things that are not accounted for: Like students that actually bring a gun to school, but did not use the weapon, students with intent to kill, etc; these variables aren't factored into this.