Note to Editors: On July 20, photographers and reporters are invited to the San Juan Learning Center, 3164 34th St., from 3-5 p.m. and to the Sunrise Assisted Living Center, 3955 28th St., from 1-5 p.m. where Denver high school students enrolled in CU's pre-collegiate program have been working with kids and seniors this summer. Call Joanna Maes for details, (303) 492-8243. Dozens of Denver area high school students will complete five weeks of community volunteering and rigorous college preparatory classes at the University of Colorado at Boulder July 20.