Choosing a PGA professional that teaches good fundamentals and the importance of a short game is what I would look for in an instructor. Good teachers make practice fun and your kids will be excited to go and work on improving their swing and game. Avoid instructors that seem very analytical in their approach to teaching. The best teachers are good demonstrators and great motivators. I like using video for kids because they are such good visual learners.
Video can be bad when used to break down the swing into many different parts.
Show good examples and use it as a tool to show progress. More on this topic is covered in my new book, Golf For Everybody . I love golf, and I think that the key to happiness would be a career in golf. I have thought of such things as being a teaching pro, and working for a company like Golfsmith and being a staff professional, or working in the actual company. I am not sure the type of education I should get.