Now in tenth grade, Mulando is already planning how to negotiate her tuition for 11th grade. She's also trying to figure out how to get to medical school. Samantha Reinders for NPR hide caption

itoggle caption Samantha Reinders for NPR

Arne Duncan, U.S. Secretary of Education, will step down in December — after nearly seven years in the job. Astrid Riecken/Landov hide caption

itoggle caption Astrid Riecken/Landov

Education Secretary Arne Duncan said in a letter to his staff that he will step down to spend more time with his family, who live in Chicago. Chip Somodevilla/Getty Images hide caption

itoggle caption Chip Somodevilla/Getty Images