CAPE CANAVERAL, Fla. -- Students present their investigation project to their peers, scientists, engineers and education specialists during the NASA Explorer Schools Symposium at Kennedy Space Center in Florida. About 60 fourth- through 12-grade students from across the nation are at the center May 4-7 participating in tours of processing and launch facilities and the U.S. Astronaut Hall of Fame, as well as several educational activities and a career panel question-and-answer session. About 30 teachers will receive professional development opportunities during the symposium.The participants were competitively selected after they completed an original investigation focused on existing NASA missions or research interests.