My son is a sophomore in high school. My daughter is in fifth grade. Almost every day after school I've asked them, "So what did you learn in school today?" I've gotten the same answer every time. "Nothing."
Somehow they've managed to progress in all of their subjects. I've read their textbooks and I can see the difference between kindergarten and fifth or tenth grade.
So just where were they doing their learning? My guess is that all those video games they play are more educational than we think.