This survey asks about the costs of homeschooling.
For the first question: Consider educational expenses for things that happen within your family (e.g. curriculum, books, and education tools and supplies like math manipulatives).
For the second question: Consider expenses for academics that happen outside the home (e.g. academic classes and tutors, including online classes).
For the third question: Consider expenses for "extracurriculars" (e.g. gymnastics or art classes, field trips).
If you are not sure, just make your best guess as to your expenses and which category they fall under.