I have three like that. Accommodating until they're not, and then nothing will budge their refusals.
My son got a D+ in AP Calculus in high school because he refused to do the homework. Why? Because on the first day of class the teacher said it was optional. When enough kids didn't do the homework, he changed the rule. My son decided it was unacceptable to change the rules halfway through the semester, and his refusal to do the homework almost cost him his graduation. And despite this, the teacher loved him. We saw the teacher the other day in a store, and he told me my son was a delight in class.
Hang in there - you're in for a lot of fun over the next several years.
