
I didn't want you ending up
with a bad GRADE and get discouraged...
The Big Bang Theory Season 6, Episode 6

In the first GRADE, my friend Rosie and I
made a pact to marry Bert and Ernie.
The Big Bang Theory Season 3, Episode 5

Before that, I was in college,
and before that I was in the fifth GRADE.
The Big Bang Theory Season 1, Episode 4

Pink wine and pizza bagels!
It's like eighth GRADE all over again!
The Big Bang Theory Season 10, Episode 13

I'm just a harmless little girl
with military GRADE spy equipment.
The Big Bang Theory Season 9, Episode 8