What do you think about Oakland California's decision to consider AfricanAmerican english a separate language?

That doesn't make it a separate language. American newspapers choose to use American dialect - that doesn't mean American English is a different language from UK English. It makes a certain amount of sense, as long as standard English isn't neglected. Practically speaking, I would ume most of their teachers speak some form of AAVE anyway, so I don't think it would really have any effect. It would be like a Georgia school district declaring that students will be taught in Southern, as if they aren't already being taught in Southern. Who cares?