High Tech U, a three-day program that introduces 40 local high school students to math- and science-based careers, returns to Clark County today through Thursday. Students will visit Hewlett-Packard, WaferTech and Clark College. The third-annual High Tech U event is coordinated by the Southwest Washington Work Force Development Council and the SEMI Foundation. Including this year’s participants, 111 high-schoolers have gone through the program.