The Science Muse - free resources for teaching science
The Science Muse is a great site for finding science resources to use in class. The resources are organized by grade (K-5 and 6-8), topic (Biology, Chemistry, Environmental Science), searchable, lesson of the day, and much more.
There are lesson ideas and resources, lesson plans from other teachers, and much more.
This is a great resource if you teach science in any way in your classroom.