We all know that what you actually learn in the classroom is only part of what makes college such a valuable life experience, but an era of ever-rising, higher education costs, ever-tougher job markets and student loans hitting trillions of dollars, those heading to college may want to give some thought to the ROI (return on investment) of college degrees. Salary.com has done some calculations on some popular professions to see how well they fare. Copywriting, journalism, hotel management, teaching, fine arts and social work all fell between 17% and 22% ROI. What careers offered the best ROI? For that, we turned to simplyhired.com and found that STEMs topped the chart. That’s science, technology, engineering, and math. That said, according to Slate.com, those with passion on their side claim to be the happiest in their careers. Learn more at Salary.com.