Well, the kids are supposed to learn things, not to be entertained.
Sometimes the two can coincide, and it's great and inspiring when it does, but the idea that learning must be an entertaining activity only does a disservice to learning, and hampers the progress of the learners. Sometimes it's just hard practice with no fun, and it's done for the sake of learning, not for giggles.
The kids who wanted to do well always learned the material no matter how boring the material was taught and the kids who didn't want to learn didn't learn a thing even with the most engaging teacher. Teachers can only do so much.
Plenty of schools have random assignment for students yet teacher A's students vastly outperform teacher B's students. Sure, the best student in B is generally better than the worst student in A but they are still generally behind the best in A.
(http://www.centerforpubliceducation.org/Main-Menu/Staffingst...)
I'm very well aware of studies showing that teachers make an impact. That much is obvious. What I'm not aware of is any significant group of schools that regularly use random assignment.
If you mean at the school level, that's a policy choice which is far from universal. However, their are a lot of schools and a meaningful number do random student assignment.
The alternative to school was for girls to help out around the house until they were married off and for boys to either learn their father's trade and then do that for the rest of their lives or get apprenticed off to whoever could take them and then do _that_ for the rest of their lives.
School helps children create a life for themselves. If children don't learn anything there they'll find far fewer paths open to them later on.
I blame the adults.
The kids who are at school because they like to learn don't need a teacher. The other kids should learn to hunt and be strong.
I don't think anyone is suggesting this is the silver bullet, but it's one less distraction towards the goal of getting kids to learn things and also to learn how to learn.
I'm all for moderation but the kids I have come across in my K-12 experience, if they're not paying attention, are generally pretty bored out of their minds with whatever else is going on in the classroom. Which begs the question; whose fault could that possibly be? The child's or the adult in the room?