Now to be fair, I don't know these (almost exclusively) gentlemen at all. Maybe they are the "best teachers ever". They're certainly much better rappers than me. But I can't help but see this as a) extreme pandering and b) extremely limited in the amount of content you can teach and c) still just another form of memorization!! I'm all for kids learning through song...but that's for when you're learning your ABCs or the names of the US Presidents, or the States and Capitals. When you're teaching complex math formulas and English vocabulary, it's cute to be able to rap about them...but then what? Do the kids actually know what to do with the content? It makes for great YouTube videos...but do the Best. Teachers. Ever. have a second act? And if so...isn't that what we really need to see?
Also, for the record, learning content through music isn't new at all. I remember seeing a Happy Days episode in which Chachi learns the different elements of the heart by teaching himself a song about it...so he can memorize terms for a test. Why this "best method ever" has suddenly made a resurgence online is a bit perplexing.
Obviously, when it comes to teaching, even the goofiest things can still help. But Best. Ever? That's something none of us have seen yet.