Is it a feature you can disable on the iPad? I never considered that kids would be doing that. My spelling was never great but I just always chalked it up to the way my brain worked. Even when I spent a couple years in college spending most of my free time reading books both to myself and our loud to my partner I still didn’t remember how certain words were spelt because I often didn’t write them. If I never wrote them as you are saying I imagine it would have been much worse.