Where? I've been teaching for 26 years in three different states, K-12 and college. The only teachers that ever made that were professors at universities (and this is only bigger institutions) or administrators (not teaching).
As for only working 9 months. Many teacher work on professional development (have to to stay certified), plan, and prep for fall classes during the summer. Most teachers have to get second jobs during the summer to help make ends meet. They don't get paid for the summer or any holidays/breaks.