Grouchology

"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.

Appearances

 * Sesame Street
 * Episode 4260