The activity comes with 4 YouTube video links (entitled: The NASA moon landing, Life on Mars?, Galileo's Story, and Life on a Space Shuttle) along with small-group discussion questions. This activity worked great with my 7th graders and really engaged them in discussions. I would play the video twice and then let them discuss and answer the questions.This lesson is student-centered, meaning:--it allows you to become a facilitator!--happier teachers!--happier students!--happier administrators!Che