Statistics shows that people read the greatest part of everything they will read in their lifetime before the age of 30. Also, the main tenets of everybody's personal worldview are formed before that age. After thirty, most of us keep recycling the knowledge, the information and the opinions we received before our thirtieth birthday. Teachers, however, keep learning as long as they continue walking into a classroom. No matter how many times they might teach the same course, there will always be new, unexpected questions that students might ask. As a result, teachers never stop learning.