GROUCHology is a course taught at Putrid University (P.U.) as shown in SESAME STREET EPISODE 4260.
The course is taught by Professor Nikola Messla (played by Jason Jones) & the Pesties (performed by JOEY MAZZARINO, LESLIE CARRARA-RUDOLPH & MATT VOGEL) about the goals of the GROUCHology online school.
OSCAR THE GROUCH takes this online GROUCHology class from the college, learning how to be a GROUCH scientist. Messla instructs OSCAR at his TRASH CAN, via webcam, helped by the Pesties.
"Sesame Street" Grouchology w Jason Jones
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