One of Christa McAuliffe most quoted lines was, "I touch the future. I teach." McAuliffe, the first teacher chosen to go into space, had planned to distribute science and engineering lessons and share demonstrations with students around the world. She, along with the other crew members of flight STS-51, died when their Challenger shuttle exploded 73 seconds into flight. Now, this long-mourned high school social studies teacher's "lost lessons" have recently been updated and made available to teachers.