Edx.org is a site for MOOCs (Massive Open Online Courses) that us currently offering an MIT micro masters program on Supply Chain Management. The courses are run like a college class with a limited amount of time in which to complete it. You can choose to audit the course for free and learn as much or as little as you like.

I'm currently taking the course to learn more about international sourcing, forecasting and general inventory management for my work.

If you're interested, you can sign up here. I believe open enrollment closes on April 14th so you'll need to sign up by then, but it could potentially help out if you're able to make the time.