"Public schools aren't the greatest when it comes to accelerating social mobility - a lot of my graduating class is still in my hometown." <sarcasm>"Social mob

"Public schools aren't the greatest when it comes to accelerating social mobility - a lot of my graduating class is still in my hometown." <sarcasm>"Social mobility" doesn't necessarily mean moving upwards only. Public schools therefore may indeed contribute to public mobility and even be an accelerating factor to it!</sarcasm> The fact that the graduates of your class are still in your hometown does not really say much about social mobility, it does only about mobility.