See the pathfinders for:                                                                                 

Astronomy

Physics

Earth Sciences

Meteorology

• Discovery Channel
• Disney.com
• Public Broadcasting System
• The Perpetual Preschool
• LessonPlans.com
• LessonPlanz.com
• National Aeronautics and Space Administration [NASA]
• National Oceanic and Atmospheric Administration
• Nick.com [Nickelodeon]
• Animals: explore, discover, connect
• Maps101.com
• Volcanoes.com
• Janicevancleave.com
• Bill Nye the Science Guy
• Global Earthquake Response Center
• Vocabulary.com: Educational Stimulation & Fun
• The Lesson Plans Page
• SearchEdu.com - Education site search engine
• TeacherVision: Lesson plans, printables and more
• The Math Forum