" My grades were dropping. My grades aren’t too good to begin with, but they’re pretty stable. Your average C work with an occasional B or D thrown in. I’ve been known to fail tests, but when I dropped to a solid D average, no one seemed surprised or even said anything and that surprised me.

Ordinarily, my parents would have hit the roof, and my teachers would have called me in for conferences. They’d have said things like, “We know you can do better. You’re a smart girl. You have a high I.Q.” (That’s true. I do.) Or, “We know you can do better. You’re Janine’s sister.” That was the killer. It was also the point. I’m Janine’s sister, not Janine.

Anyway, except for feeling tired all the time, I wasn’t sure why my grades had gone down. I did my homework more often than usual. I read all the chapters that were assigned to us. But I’ll admit that it was hard to concentrate. Maybe that was because suddenly it had become hard not to think about Mimi.

For awhile, I tried to shut her out of my mind. Now I couldn’t. But why didn’t someone say something to me? Why did they let my grades slide? Just because Mimi had died? Mimi would have wanted me to do well in school, if I could. "

― Ann M. Martin , Claudia and the Sad Good-bye (The Baby-sitters Club, #26)