With budget cuts looming, and with more states considering radical changes to teacher tenure and other important policies, 2011 looks to be a big year for education, for better or for worse. Here are 11 reformers who are poised to shake things up even more in these tumultuous times. These activists are political and apolitical, working to change school systems from within and without, and can be found in the for-profit, nonprofit and governmental sectors. Some are big names in the education world, while others are more behind-the-scenes players. But what they all have in common is the potential to change how Americans think about education and how kids experience school in 2011 and beyond.