Thirty-two years after the Challenger disaster, a pair of teachers turned astronauts will pay tribute to McAuliffe by carrying out her science classes on the International Space Station. Astronauts Joe Acaba and Ricky Arnold will perform some of McAuliffe’s lessons over the next several months. Four lessons — on effervescence or bubbles, chromatography, liquids and Newton’s laws — will be filmed by Acaba and Arnold, then posted online by the Challenger Center, a not-for-profit organization supporting science, technology, engineering and math education. The lessons should be available online beginning this spring.

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