From afar, it sounded as if a small army of tap dancers had overtaken an exhibit hall at the George R. Brown Convention Center on Sunday. Rather, it was 100 junior Olympians frantically assembling ...

Editor’s note: This segment was rebroadcast on Sept. 30, 2025. Click here for that audio. In the early 2000s, thousands of U.S. schools had their students race the clock to stack cups in gym class.