After conquering algebra in kindergarten and geometry in the second grade, Stephanie Mui, 17, earned multiple college degrees — all before receiving her high school diploma. The Virginia resident learned the basics through flashcards, and by the time she was in fifth grade, signed up for community college courses. After earning her associate's degree, she went to George Mason University, where she received her bachelor's of science in math, and this weekend, she was awarded a master's degree, also in mathematics.