BUFFALO GROVE – A half dozen girls skated in every direction across the ice during a recent training session at Twin Rinks Ice Pavilion in Buffalo Grove. To the unaccustomed eye, figure skating training looks like chaos. But these girls know what they’re doing. In the center of the ice, Bradie Tennell worked on the same sequence over and over again. The 20-year-old, who lives with her family in Cary, is coming off the most successful year of her figure skating career, during which she won the ladies’ singles title at the U.S.