I actually discussed the Waldorf teeth/reading belief with my DD's special ed teacher. She heard Steiner and immediately started saying "No I don't know anything about that and don't agree with their reading philosophies at all." Then she heard "teeth" and changed her tune entirely and said that in fact after 30 years of being a special ed teacher she now asks to see the teeth of the children who get sent to her and for the most part, although she tries and tries, she often doesn't see much progress until they start getting adult teeth. She was clear that this obviously doesn't apply to all children and many children learn to read with ease long prior to getting their teeth, her own children included. But amongst the kids who DON'T learn to read and get sent to her for remediation she does see a definite pattern. She wishes she'd kept all her notes so she could do a study on it. Even more anecdotally than that, my own DD did not turn a corner with reading until she finally started getting adult teeth (at 7+). And then took off fast, she still can't spell though.