There are many ways to accomplish this transfer of knowledge, some of which are more successful than others. I think the most important thing when preparing to teach is to keep in mind your audience, meaning their age, their background, and their life experience. If you can create a lesson that works with these different areas then I feel that teaching can be successful and meaningful. Using activities that keep the interest of the students while helping them to understand what is being taught are the best teaching tactics to use. I also think it is important to break things down to their simplest form for the students. I think a lot of times when we are good at particular things it is hard for us to explain in simple terms to someone who is just learning. Maybe if you act as though the person knows nothing about the subject one would be more effective in portraying their message. But I think with that also comes the danger of appearing to be condescending or belittling the student. That is something you would have to watch for and be careful to avoid.