NWREL Inquiry Strategies for Science and Mathematics Learning - NWREL's Science Inquiry Model was developed to help K-12 teachers infuse inquiry into their science instruction and curriculum. This site has links to publications in PDF format. 

Annenberg Video - www.learner.org video series

• Learning Science Through Inquiry (also found here)
• Looking at Learning... Again, Part I
• Teaching High School Science
• Science K-6: Investigating Classrooms