Lorna nodded once, "I always have been," which was good, as you kind of needed math for any field of science, and doubly so when you added the word "physics" to it. Geology wasn't just rocks, and geophysics wasn't just about those aforementioned rocks.
As it was, she was just glad to be back in school, she thought, "You don't need help with it or anything, do you?" she asked. She really wasn't the best tutor. Tutoring required you be able to relate to people, and she never quite could. Or she did sometimes, but more often than not it failed. Hard.