Environmental Health Perspectives Science Education Program
Provides over 100 high-quality science and interdisciplinary lessons based on selected articles and scientific research published in EHP. These lessons advance critical basic skills through the context of engaging, current environmental health topics. Lessons are aligned with National Science Education Standards in biology, chemistry, environmental science, geology, and physical science, and are targeted at students in grades 9 through 12.

LabWrite 
Help understanding and writing science lab reports

Classroom Tips for Teaching Inquiry
A practical article from the Environmental Literacy Council

The Science Spot
This is a great resource for middle school educators and students. Look for lessons in the Science Classroom and links for kids in the Kid Zone.

Exploratorium
Resources for teachers including original activities, professional development and more - from the ultimate science museum and outreach center

Kathy Schrock's Guide for Educators
The original collection of online resources is now co-sponosred by the Discovery Channel.

Case Studies in Science
Case Studies in Science for use in the classroom organized by content area

How Stuff Works
Explanations, animations and graphics for everything you can imagine

Learner Online
Interactive activites, teacher resources and interactive workshops for all grade levels

Explore Learning
Science and math online interactives and simulations - this is a pay site but there is a 30 day free trial.

SEED Virtual Science Lab
Online virtual science experiments

BBC School Science Clips
Interactive animations

This work by The Science House is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.