This link contains four segments: Science of Light, Technology of Light, Math of Light, and History of Light. Depending on  the link, there are appropriate activities for elementary all the way through high school. You will find explanations, lessons, and interactive labs to experiment with light concepts.

Online assessment tool for teachers of all subject and grade levels. Especially useful for student math practice and testing online. Available in English, Spanish, Polish, Slovenian, and French. Math, geography and science are highlighted.

SuccessLink is a valuable resource for Missouri educators. Teaching activities and exemplary programs are recognized and shared freely throughout the state. The SuccessLink web site has a database filled with lessons written by Missouri teachers. Lessons are searchable by subject/grade, Show Me Standards, Grade Level Expectations and keywords. Lessons are performance-based, aligned to state standards and most have an assessment component.

The National Center for Earth and Space Science Education addresses science, technology, engineering and mathematics (STEM) education with a focus on earth and space. Content includes K-12 Education Modules composed of inquiry-based, hands-on lessons at elementary, middle school and high school levels.

Kids Science news Network, students K-5 can get questions answered about math, technology, computers, NASA facts and many more topics.

The official NASA site for Kids' only! Have fun with all the interactive games, activities, stories and much more from NASA.

Site for all ages that are interested in or are curious about mathematics.

A math website with a problem of the week for middle school students...the answer will appear the next week.

This site offers lesson plans, educator guides, Kids’ Connection Magazine.
Standards-based, hands-on lesson plans cover topics from plant science to food science to animals to conservation, and they are aligned with subjects like science, math, and reading.

This Internet Public Library site has a step by step project development that can really aid first-time science fair entrants. Its tools and resources segment has information links to understanding measurements, to finding resource information on science topics written for kids, and others.