* Appropriate for grades 3rd - 12th From a habitat hidden deep underwater in Florida, to the world’s most amazing swimming pool, dive into the underwater world of outer space! SPACE SCHOOL is the incredible story of how astronauts train underwater to live and work in space. From microgravity simulation at NASA’s Neutral Buoyancy Lab, to living under the sea at Aquarius Reef Base, astronauts spend a lot of time training underwater.