Barbara Radding Morgan (born November 28, 1951) is an American teacher and a former NASA astronaut. She participated in the Teacher in Space program as backup to Christa McAuliffe for the 1986 ill-fated STS-51-L mission of the Space Shuttle "Challenger". She then trained as a Mission Specialist, and flew on STS-118 in August 2007. She is the first teacher to have been to space.