DAN ZIELINSKI, director of the planetarium at Jenks High School in Oklahoma, whizzes through his greatest hits. First he projects onto its dome a 3D image of a human heart; next comes the Sistine Chapel, then the solar system. The planetarium is an impressive asset for a high school, as is its aquatic centre, with an Olympic-size pool and grandstand seating. But there is a hitch, says Bonnie Rogers of Jenks Public Schools: filling the new buildings with teachers is much harder than erecting them.
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