Bill Gates participates in a Teaching and Learning Conference -DC

Bill Gates participates in a Teaching and Learning Conference -DC. Bill Gates, founder of Microsoft and co-chairman of the Bill & Melinda Gates Foundation, participates in a discussion at a Teaching and Learning Conference organized by the National Board for Professional Teaching Standards at the Convention CenterMarch 14, 2014 in Washington, DC. Photo By Olivier Douliery/ABACAUSA.com URN:19298095