I have always thought of EF as being an innate skill. DD wakes herself up, checks the weather, picks out her clothes, makes her breakfast (cereal, toaster waffles etc) by herself and has done so since kindergarten. She is completely responsible for her homework and studying for tests (i don't even glance at them). If she needs extra help studying for a test she will let us know. She has never had behavior issues (very minor and only at home), keeps her room clean by herself and has been this way as long as I can remember. I am sure she gets it from her dad but it is interesting to watch. I certainly can't think of anything that I have done that would have improved her EF.