You've just given the most concise and accurate description of my fourth grade year I've ever heard. Unsurprisingly, leaving the public schools after sixth grade was the best thing to happen in the development of my social skills.
I pulled my sons out of public school and homeschooled them when they were in 3rd and 6th grades. My oldest son was an extremely poor fit for public school. I have sometimes said that I homeschooled to prevent "the next Columbine". (He was having fantasies of plowing through the school in a tank and his career-military father had keys to a military motor pool at the time.) For that and other reasons, I've had lots of opportunity to think about such things.
