"I..." lucky? Sarah wasn't sure she ever was described as lucky for going to school. Not by another person her age at least. Adults sure. But never teens. "I suppose I am, yes."
That was going to give her something to think upon for a while. The idea that she's lucky to go to school. The idea that there are people who don't get to go to school and don't get to learn. And... she also can't imagine how hard it would be to go through life not knowing how to read.
"That's good though. That you're learning and you can understand little things. It'll get easier. And then you can read all sorts of books!"