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

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

I was only being polite.
Pemberton is a GRADE A weasel.
The Big Bang Theory Season 12, Episode 21

Sixth GRADE. But I wore a sport coat
and carried a brief case so...
The Big Bang Theory Season 9, Episode 15

...to be picked for a game in fifth GRADE,
I'm sure you do suck.
The Big Bang Theory Season 8, Episode 3