Are there any really decent examples of devices like tablets being utilized creatively and effectively in a K-12 classroom? I don't want to sound cynical or li

Are there any really decent examples of devices like tablets being utilized creatively and effectively in a K-12 classroom? I don't want to sound cynical or like a luddite (I would be posting on the wrong site, for sure), but nearly every application that I have used that is meant to be used in a classroom environment has been extremely shallow.