Matthew Perry as Ron Clark

Judith Buchan as Snowden School Principal

Ernie Hudson as Principal Turner

Griffin Cork as Hadley

C.J. Jackman-Zigante as Y'landa

Melissa De Sousa as Marissa Vega

Aaron Grain as Jason

Brandon Mychal Smith as Tayshawn

Pete Seadon as Principal

Hannah Hodson as Shameika Wallace

Jerry Callaghan as Ron Clark Sr.

James Dugan as Mr. Lively

Patricia Benedict as Jean Clark

Gerrick Winston as Mr. Solis

Jacey Mah as Ms. Hill

Marty Ronaghan as Jackie Vasquez

Micah Williams as Julio Vasquez

Bren Eastcott as Badriyah

Baljeet Balagun as Badriyah's Father

Candus Churchill as Doretha Wallace

Isabelle Deluce as Alita

Lashonda Mitchell as Raquel

Marty Antonini as Howard

Patricia Idlette as Devina

Patti Kim as Tisha

Wally Houn as Chef

Pamela Crawford as Ms. Benton

Aziza Sindhu as ER Doctor

Daniel Lee Robertson III as Dominican Kid

Melissa Cambridge as Junkie

E.J. Bonilla as Hispanic Kid

Marilyn Potts as Lunch Lady

Chris Enright as Superintendent