14.76K Max Rivlin-Nadler 10/26/13 03:15PM Filed to: No They Did Not Have Yo-Yo's! No They Did Not Have Yo-Yo's! RIP Edna Krabappel. Marcia Wallace, whose four-decade career in television included roles in "The Bob Newhart Show," "Murphy Brown," and most famously, as Bart Simpson's divorced teacher on "The Simpsons" has passed away at the age of 70.