Every Thursday, this NASA-created learning resource presents a new topic with the aim of providing "a lasting connection between NASA's latest research and the classroom environment." Prior lesson topics have included the recent solar eclipse, the Mars Polar Lander, and organisms that survive in extreme conditions and their implications for the possibility of extraterrestrial life. For each lesson, there are links to news reports and a range of lesson plans and activity sheets designed for different age groups. The site also contains an archive/ schedule of prior and future lessons.