(spQrts prQbe) NBC airs Ski Classic; Baseball stars teach ISKI STARS NBC newscaster news-caster Tom Brokaw and a:!or Clint Eastwood are among the celebrities par-t;c:pating par-t;c:pating in the American S: Classic from Vail. Colo.. 'hch NBC airs Saturday. : '.'arch 26. Former Presi dent Gerald Ford is exp-ected to host the event. addition to the celebrity events, men's and omen's World Cup giant s'aiom competitions will be FIGURE SKATING "The World Figure Skating Championships: Exhibition ' Champions" debuts "Thursday. March 24 on H'BO. Taped in Helsinki. Fm'and. the show marks a 5 spectacular finish to the fig- ure skating championships ard a'so includes interns inter-ns with the victors and Qhiights of their winning Performances. Barry Tompkins will host the P'ogram. His co-host and exCert commentator will be ,0P professional figure sa'er Jo Jo Starbuck. the former North American bating gold medalist. diamond stars Ore ma,or league manager f f V X Tom Brokaw and nine active players, including 1982 National League MVP Dale Murphy and three-time batting champion Bill Madlock. will join host Mike Schmidt of the Philadelphia Phillies on the upcoming baseball installments of USA Cable Network's "Scholastic Sports Academy." an instructional series for youngsters. Other guests on the show, which begins airing Apr. 2. are Cubs manager Lee Elia and players Frank White, Chris Chambliss, Tom Hume, John Stearns, Tim Raines, Garry Mad-dox Mad-dox and Dick Ruthven.