Yume has a アルバイト (arubaito) or part-time job working at a "cram school." Cram schools are tutoring schools for middle school and high school students that take place after school. She teaches 13-15-year-olds in English and math for college exams.
Yume wanted to know what you thought was the hardest subject in school. Most Japanese students find English and math to be the hardest. Yume says math is definitely the worst.