I have always been fond of Edna Krabapple, the cigarette-smoking teacher seen on "The Simpsons" and brilliantly voiced by Marcia Wallace, who, years earlier, was Carol the secretary on "The Bob Newhart Show". Edna has never looked so brilliant wearing that green sweater and matching skirt, along with a bright-colored shirt. I never do know, however, if she is wearing bike shorts underneath that skirt--if she is, it makes her even more attractive, smart and sexy. For years, Edna has had to endure hundreds of practical jokes pulled off by Bart Simpson, such as her medicine being switched with Tic-Tacs or putting liquor in her coffee. Bart h