I got held back in kindergarten.
i did 2 years of preschool
..because i was too young
but honestly your sister has no reason to be worried about her grades enough to scream at you for a 99% so i'm gonna assume that's a bit of bullstuff. however, i'm not surprised that she's smart in 4th grade - why do you care that she's smart if you're older than her? you're in a higher grade and obviously smarter than h--
I told meh daddee dat she screamed at me/
i take that back she may be smarter than you.