(AP) — Anyone interested in learning more about effective giving from billionaire Warren Buffett and other prominent philanthropists can again sign up for a free online course.

Students in the class that’s scheduled to start in March will be able to help decide how to give away at least $100,000 of Buffett’s sister, Doris’, money.

The classes feature advice from prominent givers like the Buffetts, baseball legend Cal Ripken Jr., reporter Soledad O’Brien and others.

This will be the second time this class is offered. In the first class students helped pick 40 nonprofits to share $130,000 in grants.

The class is backed by Doris Buffett’s Learning By Giving Foundation and Northeastern University. Anyone interested in the course over the age of 13 can sign up now at www.learningbygivingfoundation.org .