To become socially with the times. I.E. texting, iming, use of myspace and facebook become common. Sex, drugs, and alcohol slowly work their way into the picture.
My friend was soo childish in 5th grade, then in 6th, he became more chill. He got a girl and and a blackberry. He had gone through MiddleSchoolization
A hardo is a person who tries extremely hard at everything. Most times a hardo will try very hard at things that do not require excessive effort. For example, sports practices, gym class, etc.
Wow did you see Jack at practice today? What a hardo!