Back to the books means back to parents scratching their heads in disbelief when it comes to homework time. That's because Common Core has taken hold much of the nation's math curriculum, and both traditional and new math have been replaced with "Base 10." The process involves students whittling down math equations to the "friendly" number 10, which is supposedly easier to work with than other numbers. Confused? Yeah, so are we. That's why this teacher from Williamsville, NY, appeared on an upstate New York news program this week — to walk parents through it. Watch and learn why it takes a full minute find the answer to 9+6=X using Common Core math.