Katie Hirdler has had it with filling up her tank. With each fill-up costing $70, Hirdler is always looking for ways to avoid visiting the gas pump. Hirdler traded in her truck for a Cadillac. She took a job as a nanny for a local family. And, despite being "not really that great with computers," the 22-year-old freshman at Moraine Valley Community College decided to give online classes a try this summer.