The little A+ SNOOTlet is actually in the same dialectal position as the class’s “slow” kid who can’t learn to stop using ain’t or bringed. Exactly the same position. One is punished in class, the other on the playground, but both are deficient in the same linguistic skill—viz., the ability to move between various dialects and levels of “correctness,” the ability to communicate one way with peers and another way with teachers and another with family and another with T-ball coaches and so on.

— Alan Jacobs, How to Think