@LuisvonAhn@duolingo When von Ahn heard that his language-learning app had become a vital teaching tool in refugee camps, his company waived the fees for over 135,000 displaced and low-income students for its English proficiency test.
@LuisvonAhn@duolingo The National Geographic 33—inspired by our 33 founders—is an initiative honoring changemakers who are rising to meet the most critical challenges of our time, making meaningful progress and incredible breakthroughs.