President Obama hopes to recruit 100,000 math and science teachers to America's classrooms. Great move--we need a well-prepared 21st-century workforce, and qualified math and science teachers can help. But here's the thing: nearly half of new teachers leave the workforce within five years (a percentage that's been on the rise since the 1980s). And by the way, high-poverty schools (and students) get hit hardest. So how do we fix this? Read and comment on what teacher Jose Vilson suggests.