NASA
Nasa: 1nd Century Explorer: How Would Your Body Change in Space?
This article explores the changes an astronaut's body goes through in space. Also find the answer to many other fascinating questions people have about space travel.
Technovation
Curiosity Machine: Challenges: Engineer a Space Tool
Using common household items, make a tool that an astronaut could use to pick up an object in space. This site also includes tips, lesson plans, and a place for students to document their engineering design process.
National Women’s History Museum
National Women's History Museum: Sally Ride
Biographical profile on Sally Ride, the first American woman in space.