There''s an exercise Urbana goes through multiple times during the course of a girls'' basketball game. It''s called Jumping Jack. There''s no resemblance to the routine physical education instructors have had their students perform for years. The drill at Urbana goes like this: Someone shoots the ball and misses. Jumping Jack (aka senior Jackie Williams) leaps up and corrals the rebound. She exercised her right to the basketball on 11 occasions Thursday night as the Tigers turned back visiting Champaign Central 53-42 in a Big 12 Conference game. Centers are supposed to be dominant rebounders like Williams. However, few post players are of Williams'' build and even fewer can match her vertical jump without a pogo stick. "No one would think someone 5-foot-4 can get the type of rebounds she gets," said Urbana coach Aimee Smith, "but her height is deceiving." Williams was the Tigers'' top rebounder and just missed a double-double, chipping in nine points. Another Urbana senior, Nicci Cooper, scored a game-high 16 points. The Tigers (7-4) scored the game''s first 10 points in a 3:07 span, using a fullcourt press to force the Maroons into turnovers on their first three possessions. "Defense has been an emphasis," Smith said. "You have to play consistent defense because you don''t know when you''ll have an off night shooting." Central coach Kimberly Seward- Burton used 10 players during the first quarter, and reserves accounted for all eight points the team had during the first 9:34. She said Urbana''s defensive pressure was expected. "It wasn''t a surprise," she said. "They''re a very aggressive team. We didn''t execute at the beginning." Sparked by Ashley Aina, who had an eight-rebound second quarter (and a game-high 14 boards), the Maroons stormed back and took a 23-21 halftime lead. "We let down, had a couple turnovers and let them back in it," Williams said. Central limited the Tigers to three second-quarter points, the last one coming 9.2 seconds before halftime. "When we came back, everyone was playing their roles," Seward-Burton said. The Tigers reversed their fortunes the second half, taking the lead for good at 27-26 on a shot from the lane by Kati Pisula with 5:06 left in the third period. "In the second half, we fixed a couple things, and the kids responded well," Smith said. "We talk about weathering the storm. "There will be ups and downs in a game, but if we''re tough mentally, we''ll be there at the end." Aina led Central (4-8) with 10 points. The Maroons'' top scorer for the season, freshman Allie Lindemann, had eight points but was held to one basket the first 22:58. Lindemann and Erica Rodgers each had three steals. Central struggled from the field, making 15 of 61 shots (24.6 percent), but Urbana struggled from the free throw line, hitting 6 of 13 in the fourth quarter and 12 of 24 overall. * Centennial 65, Mattoon 48. Annie Parrett played in her 100th varsity game and scored a game-high 21 points to lead the unbeaten Chargers on the road. Malana Winskas had 14 points and Ainsley Wellinghoff 10 for the Chargers, 10-0 and ranked fourth in the state in Class AA. * Danville 55, Rantoul 41. Marla Cowen and Tiffani Bourn each scored seven first-quarter points as the Vikings took an 18-11 lead on the way to a victory at home. Bourn and Courtney Lillard each finished with 12 points for Danville (6-3). Rantoul''s Lindsey Miller had a game-high 18 points. Denise Robertson added 12 points for the Eagles (0-10).