I always follow the laws. That said, would this hypothetical teaching certificate proclaim me a valid teacher to any and all grades, and in any teaching situation? ie....Grade School, Middle School, High School in any state? Would I be certified to anyone's child at home? You would have to work long and hard to get two states to agree on any requirements. jmho...
fwiw, I've lived in four different states while homeschooling and each one had very, very different requirements for home schooling as well as public schooling. Example on the number of days required for attendance.
How did I miss this thread for so long. No time to read every follow up. I apologize in advance if I've repeated or missed something.