The Arms Race

It's kept highly secret what the concentrations were actually created for. Simple fools say it was for focused education and it's just a way that 9th graders can decide what they want. However the truth is much more complex. It all started with F&F and E&E, their first true names forgotten. These concentrations were created by the all powerful principal at the time, [Data Expunged]. He intended to increase the strength of the school via advanced weaponry with these new concentrations using the minds of young students to help create them. Within the first few months of their creation, parts of F&F and E&E split off, forming C&C and B&B, and later a new concentration, █&█, was formed but keep in secret from the others. After more infighting, they declared war on each other and now create weapons to use against each other. As the war goes on the weapons become more and more lethal.
In the beginning, it was simply two concentrations. In F&F some began to want more than just wood and band saws. They wanted electronics, programs and all the such. The concentration then split into those who were devoted to the new age of computing and those who worked with tools and material. C&C was created and had begun making equally powerful machines. 
Similarly, the people of E&E had arguments over macro biology and microbiology or something idk, its all pretty much the same. The new B&B concentration was formed from E&E and they still argue about it to this day.
Years later, a secret gathering of those who did not belong grouped together to found the 5th concentration. █&█, a concentration that focuses on the unworldly and the unexplainable.
As time passed, the 4 main concentrations had their differences grow. The F&F and C&C guys really did not like the E&E and B&B guys, and they began developing weapons to destroy each other. The petty arguing between E&E and B&B became more and more threatening, and C&C and F&F were pretty much neutral towards each other. 
E&E developed beasts to destroy F&F machines, F&F developed machines to destroy C&C electronics, C&C developed electronics to destroy B&B biohazards, B&B developed biohazards to destroy E&E beasts. It is an everlasting cycle of mayhem. Small skirmishes have become common, and full out assaults have yet to occur. Only time will tell when the true war will begin.