I would love some input on this. My oldest is 12, and I haven't spent much time customizing his history and science texts. He deals with information in a different way than he did when he was younger. God is the author of history and science. Everything is related because it originates from Him.
Formal logic is a great tool in helping a student in the logic stage discern truth from error.
I think this discussion also gives my son a chance to bring up potential doubts and stumbling blocks in a neutral, impersonal context. I'd be interested in hearing more of the details of how you have tried to bring Logic into your 14yo's history and science studies. I'm sure it does get more complicated as your son gets older, and I like to hear the perspective of homeschoolers with older children. Thanks in advance for any input. I had my son skip the textbook problems and just do the tests.