While Bill and Melinda Gates, along with Warren Buffett, are advocating for billionaires to give more of their wealth away, a separate effort by the couple’s foundation is working to encourage people of more modest means to give and to do so effectively.

Last week, the Bill & Melinda Gates Foundation announced three grants to advance that goal. The grants are part of an effort by the fund to expand the reach of organizations that try to inform and inspire donors.