Teachers

What's one thing we've all had in our lives, at one point or another? Teachers. They come in many forms. Teachers are peers when we are still in diapers, they are our friendly instructors when we are in kindergarten, they are our high school mentors, and they are our college professors. Sometimes we love our teachers, sometimes we don't. What they teach us is always valuable, however, even if it takes us years and years to get it through our heads. Teachers are never expendable and always needed no matter what the condition of the economy. It takes quite strong and patient people to become teachers.
Add to this Teachers list, and include a summary for each.