As you guys can bring your computers to class, this is what I imagine: Image (Click to show)
If those were laptops then it'd be a very accurate representation of my first four* years of high school. In the last two years we got more serious, but a good percentage still did that.
*Dutch high schools (we just call them 'secondary schools', or lit. 'middle schools') are 4-6 years, where secondary academic education is 6 years.