Actually, the first one was in Pennsylvania in 1764. July 26, 1764, where four men entered the schoolhouse near present-day Greencastle, Pennsylvania, shot and killed schoolmaster Enoch Brown, and killed nine or ten children (reports vary). Only three children survived.
Not germaine. The kids were the victims, not the perpetrators.
Let's keep this on track. 
So because, you've never heard or read about a student/child shooting, knifing, killing, of another child from your known recorded history, it didn't happen?
Could this be yet another artifact of the faith you've put in the broadcast "news" media? I wonder...
Readers might be interested in animal behavioral studies of other mammals. Wiki has some pointers to work I've read in the days before wiki existed.
Here's A link for those interested:
http://en.wikipedia.org/wiki/John_B._CalhounYes, humans have a different knowledge base and communication structure than most mammals. But, we all have the same baser instincts which the media teases and provokes into prominence. And, we all have the same helpless feeling of being directly controlled by a central authority whose fairness is in question.
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John B. Calhoun (May 11, 1917 – September 7, 1995) was an American ethologist and behavioral researcher noted for his studies of population density and its effects on behavior. He claimed that the bleak effects of overpopulation on rodents were a grim model for the future of the human race. During his studies, Calhoun coined the term "behavioral sink" to describe aberrant behaviors in overcrowded population density situations and “beautiful ones” to describe passive individuals who withdrew from all social interaction.
In the early 1960s, the National Institute of Mental Health (NIMH) acquired property in a rural area outside Poolesville, Maryland. The facility that was built on this property housed several research projects, including those headed by Calhoun. It was here that his most famous experiment, the mouse universe, was created.[1] In July 1968 four pairs of mice were introduced into the Utopian universe. The universe was a 9-foot (2.7 m) square metal pen with 54-inch-high (1.4 m) sides. Each side had four groups of four vertical, wire mesh “tunnels”. The “tunnels” gave access to nesting boxes, food hoppers, and water dispensers. There was no shortage of food or water or nesting material. There were no predators. The only adversity was the limit on space.
John Calhoun meeting Pope Paul VI on 27 September 1973.
Initially the population grew rapidly, doubling every 55 days. The population reached 620 by day 315, after which the population growth dropped markedly. The last surviving birth was on day 600. This period between day 315 and day 600 saw a breakdown in social structure and in normal social behavior. Among the aberrations in behavior were the following: expulsion of young before weaning was complete, wounding of young, inability of dominant males to maintain the defense of their territory and females, aggressive behavior of females, passivity of non-dominant males with increased attacks on each other which were not defended against. After day 600, the social breakdown continued and the population declined toward extinction. During this period females ceased to reproduce. Their male counterparts withdrew completely, never engaging in courtship or fighting. They ate, drank, slept, and groomed themselves – all solitary pursuits. Sleek, healthy coats and an absence of scars characterized these males. They were dubbed “the beautiful ones”.
The conclusions drawn from this experiment were that when all available space is taken and all social roles filled, competition and the stresses experienced by the individuals will result in a total breakdown in complex social behaviors, ultimately resulting in the demise of the population.
Calhoun saw the fate of the population of mice as a metaphor for the potential fate of man. He characterized the social breakdown as a “second death”, with reference to the “second death” mentioned in the Biblical book of Revelation 2:11 [1] His study has been cited by writers such as Bill Perkins as a warning of the dangers of living in an "increasingly crowded and impersonal world"
