Since 1958 (Pub.L 85-568) NASA has been disseminating information about the space programs and explorations. They offer a wide range of lessons, images, collections, and primary sources. Science lessons on how things work, yes... but lets take an historical look/see at how NASA scientists approached each mission with particular goals, each utilizing new technology as they designed new experiments to test theories, explore space, and expand knowledge of the different planets, stars, and other heavenly objects.
For history of NASA, older missions:
Primary sources are created daily with recordings from space, notes, images, and documents