Science Lesson Plans from Robert Bateman

I'm discovering all kinds of great things on the "Get to Know" program website.  On the teacher resources page there are a number of lesson plans which include video introductions and PDF files, all available for free!  As the site says, the lessons are geared for grade 4-6 but are easily adaptable for older or younger students.  They can be used as a springboard for all kinds of fun learning.  Be sure to check them out.