DS's teacher, during my parent-teacher conference: "I always go to to DS when I can't remember something, like what page we're on in the book or where we left off or whatever, because he always knows. Actually, he just knows a lot of things generally. If I don't know the answer to a question, I sometimes just ask him because he might know. He just has so much general knowledge."

BTW, this is in a class composed only of gifted kids. She's really sweet and a good teacher, but my jaw did drop just a little.