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ProfessorGAC

(72,412 posts)
3. Well, Well
Tue Aug 22, 2023, 07:54 PM
Aug 2023

You'd be happy to know that since I retired, I substitute.
I only do math & SCIENCE classes! With a PhD in physical organic chemistry, my favorite to do is, obviously, chem.
But, I'll cover all the sciences.

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