LEAD, S.D. (KELO) — From Mt. Rushmore to the Corn Palace, South Dakota is known for its attractions. But not a lot of people are aware that Lead, South Dakota is home to the nation’s underground ...

He reads aloud question No. 1, and he emphasizes that students must include evidence and reasoning with their answer. “So, do not just say, ‘Yes,’” he tells his students. “Yes,” one of them responds ...