Mr. Young (2011)

S1E20 Mr Elderman

Adam attempts to help his students see the benefits of having a young teacher by impersonating a grumpy old substitute. Surprisingly, the students end up enjoying the substitute's antics so much that Principal Tater decides to let Adam go! When Adam protests the decision, Tater proposes a ‘teach-off’ to settle the matter. Can Adam cleverly juggle being both himself and the cranky substitute at the same time?