Learningpage.com provides professionally produced learning materials for the elementary classroom. Printable worksheets, activities and lesson plans for preschool, kindergarten, first grade, second grade, and third grade can be downloaded from the site.
Here are a bunch of cool patterns to use in the classroom...from candy canes, to flamingos, you can use these cool patterns to decorate and for children's projects! To see a pattern click on the name, and then you can print it out. There are also videos on how to make the patterns.
This Surfrider Foundation link gives ideas to help educate about the importance of beaches. There are experiments and projects for children, which are especially good for a science lesson.