Do you teach any subjects? What subjects? Yes; Spelling, Science, History and Bible
What roles do you play in day-to-day homeschooling activities?Above......
How can homeschooling dads get more involved? It's really schedule-dependent. The best thing, I believe, is for husband/wife to discuss what "more involvement," and "help" look like given their circumstances. I work from home, so it's possible to do what I do; but that's not the situation for every home. Also, there may be practical ways a husband can help that only his wife knows, so they should engage one another about those things.