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
For example, Lisa Peterson hasn't talked
to me since 11th GRADE.
The Big Bang Theory Season 4, Episode 7
Which brings us to 10th GRADE.
The Big Bang Theory Season 2, Episode 12
I didn't want you ending up
with a bad GRADE and get discouraged...
The Big Bang Theory Season 6, Episode 6