Country singer Waylon Jennings admits that studying for hours on the road so he could pass his high school equivalency exam did nothing to boost his career.

But he says he couldn't preach the importance of education to his 11-year-old son unless he had a diploma himself.Jennings, who passed the General Education Development test in 1989, spoke Sunday at a banquet that kicked off a three-day conference sponsored by the National Drop-Out Prevention Center..