
...by making this CLASS unnecessarily hard,
then I'm out.
The Big Bang Theory Season 8, Episode 2

No, I'm-I'm teaching a CLASS.
The Big Bang Theory Season 12, Episode 24

Hey, what if I took your CLASS?
The Big Bang Theory Season 8, Episode 2

- ...then I'll have to teach a CLASS.
- That is correct.
The Big Bang Theory Season 8, Episode 2

This is my friend Emily.
I know her from my spin CLASS.
The Big Bang Theory Season 5, Episode 4