New Year, New You in 2014

2012 Half Their Size Weight-Loss Winners

Find out how these regular people shed half their weight – nearly 700 total pounds! – without surgery or tricks

YOULANDA MARSHALL, NOW: 146 LBS.

Marshall, 34, is now 146 lbs. lighter and can fit into skinny jeans, which has her students raving. "Being a middle school teacher, you're always in shock at how the kids change in high school. Now they're in shock about me," she tells PEOPLE. "They'll come back and go, 'You used to be so fat! Now look at you – you're skinny!' That reaction is so nice."