YEP, I do!
Unfortunately, there's not much proof out "there"! ("There" being the land of peer reviewed scientific studies.)
So, this kindergarten teacher is embarking on a teacher inquiry on the effects of iPads on student learning and engagement. I will be reviewing student surveys, test results (compared to my neighbor not using iPads) from common assessments along with student gains on the STAR early literacy test.
Wish me luck! May the force be with me, break a leg, and anything else you can think of!