NEW PORT RICHEY - When Sarah Cheney began excelling in her home school lessons, her parents decided it was time for some accelerated learning at the next level. So they joined what has become a growing trend for home schooled high school students. The Cheneys signed up their daughter for dual-enrollment courses at Pasco-Hernando Community College, an option once reserved for students in public schools. ``She's done well,'' said Richard Cheney, her father. ``She's gotten all A's, except one B.'' Dual enrollment allows teenagers to take college courses while they are still in high school. The credits earned are counted...