Perhaps the most interesting part of this book dealt with misconceptions. Every students that walks into a classroom, walks into the room with misconceptions. Teachers give the students facts that dispute these misconceptions, but rarely replace the misconceptions. It is only when teachers make students active in disproving a misconception that the students actually internalize the truth. This is where the American educational system fails miserably. For example, most teenagers still believe impeachment means removal from office. When you prove Bill Clinton was never removed from office, they can actually see evidence that disputes their misconception. How else could we have proven the Earth was not flat before space travel? Demonstrating through learning which required thinking to prove a misconception wrong.