Awesome Library
   Provides carefully reviewed K-12 education resources and lesson plans covering astronomy, biology, botany, ecology, earth sciences, problem solving, and general science topics.
   http://www.awesomelibrary.org/scienceg.html

Chemistry & Biology Crosswords
   A collection of crossword puzzles for high school level students.
   http://users.rcn.com/fvirzi/x-word-home.htm

Classroom Activities and Lesson Plans
   Earth, space, life and physical science lessons prepared by practicing teachers participating in National Teachers Enhancement Network (NTEN) online courses.
   http://www.scienceteacher.org/k12resources/activities.htm

Columbia Education Center: Science Lesson Plans
   Separated into 3 age levels: Elementary (K-5), Intermediate (6-8), High School (9-12). Over 200 lessons, all in text file format.
   http://www.col-ed.org/cur/science.html

Frank Potter's Science Gems
   Science resources sorted by category, subcategory, and grade level.
   http://www.sciencegems.com/

Junkyard Wars in the Classroom
   Projects, puzzles, games, and challenge activities using junk in the classroom.
   http://school.discovery.com/networks/junkyardwars/

Lesson Plans Page
   Contains science lesson plans, ideas, thematic units and lab activities for all ages and all branches of science. Sorted by grade level.
   http://www.lessonplanspage.com/Science.htm

MAST Materials Science and Technology Teachers Workshop
   Lesson plans for teaching materials for science in elementary through high school.
   http://matse1.mse.uiuc.edu/~tw/

MiddleSchoolScience.com
   A teacher created site included lesson plans and ideas for middle school level chemistry, physics, life science and earth science.
   http://www.middleschoolscience.com/

NASA/MSU-Bozeman CERES Project
   Classroom-ready astronomy activities and lessons for levels K-12. Created by a team of master teachers, university faculty, and NASA researchers.
   http://btc.montana.edu/ceres/html/EdActivities.html

NIH Curriculum Supplemements
   Free, interactive teaching units that combine scientific research discoveries from the U.S. Department of Health and Human Services, and National Institutes of Health, with instructional materials.
   http://science.education.nih.gov/supplements/

Neuroscience for Kids
   Experiments and activities as well as teacher lesson plans about the nervous system and brain.
   http://faculty.washington.edu/chudler/experi.html

Practical Uses of Math and Science
   An on-line journal of one-page examples of Math and Science being used in everyday life. Examples are written primarily by scientists and engineers, and are available to teachers, students, and other interested parties. Motivation for interest in these
   http://pumas.jpl.nasa.gov

Re-Energy.ca: A Renewable Energy Education Kit
   Download lesson plans and construction plans for working models of solar ovens, wind turbines and water wheels.
   http://www.re-energy.ca/

Reach Out! Math-Science
   K-12 science lessons by subject, grade, and alphabetical title.
   http://www.reachoutmichigan.org/funexperiments/agesubject/subject.html