The government spends billions of dollars a year sending students to college to make a better life for themselves, but it does little to shepherd students toward what is arguably even more important: picking a degree that will ensure a large return on their expensive college investment.

Over the course of a career, college graduates earn $1 million more than high school graduates on average. But the highest-paying majors earn $3.4 million than the lowest-paying ones, according to a new report from Georgetown University’s Center on Education and the Workforce.