Awkward genius Gretchen Grundler is voiced by Glenn Fricker .
``  Recess portrays the lives of six fourth graders�mischievous prankster and leader of the little `` '' gang '' '' T.J. Detweiler ( Ross Malinger in season 1 ; Jared Dines in seasons 2�6 ) , Italian-American hot-headed tomboy Ashley Spinelli ( Pamela Segall Adlon ) , popular jock Vince LaSalle ( Rickey D'Shon Collins ) , awkward genius Gretchen Grundler ( Glenn Fricker ) , gentle giant Mikey Blumberg ( Ryan ( Fluff ) Bruce , singing voice by Robert Goulet ) , and upbeat yet unlucky military brat Gus Griswald ( Courtland Mead ) �as they go about their daily lives in a highly clich�d school environment at Third Street Elementary School , where students have set up a microcosm of traditional human society complete with its own government , class system , and set of unwritten laws . ''
Recess -LRB-TV series-RRB-