Merriam-Webster for Kids
http://www.wordcentral.com/

Fact Monster
http://www.factmonster.com/dictionary.html

Little Explorers Picture Dictionary
http://www.enchantedlearning.com/DictionaryA.html

Merriam-Webster Online
http://www.m-w.com/

Thesaurus.com
http://thesaurus.reference.com/

Encyclopedia.com
http://www.encyclopedia.com/
Short, hyperlinked articles from the Columbia Encyclopedia. A good place to start your research.

Encarta
http://encarta.msn.com/encnet/refpages/artcenter.aspx

Kids Click
http://sunsite.berkeley.edu/KidsClick!/

e-encyclopedia
http://www.dke-encyc.com/home.asp

Conversions
http://www.infoplease.com/pages/unitconversion.html
Convert between units or length, area, volume, weight, mass, temperature, cooking and time.

Ask for Kids
http://www.askforkids.com/

Answers.com
http://www.answers.com/

Yahooligans!
http://yahooligans.yahoo.com/

AltaVista
http://www.altavista.com/ 

NoodleQuest-Search Strategy Wizard
http://www.noodletools.com/noodlequest/

Scholastic Reading and Language Arts
http://teacher.scholastic.com/activities/
Interactive reading and language arts activities by grade level.

Starfall
http://www.starfall.com/
Reading activities for K-2 students.

ReviewWise
http://www.bbc.co.uk/schools/revisewise/englis...
Interactive poetry activity, worksheet, and test.

BAB Books
http://www.sundhagen.com/babbooks/
Online stories and resources for students.

42 Explore
http://www.42explore.com/42exploreenglish.htm
English and language arts topics include reading, writing, and literature.

Educational Paperback Association
http://www.edupaperback.org/resources.cfm
Links to children’s book authors and their websites.

Magnetic Poetry
http://www.magneticpoetry.com/kidspoetry/...
Drag themed words onto the screen to create poems which you can submit to be published.

Read Write Think
http://readwritethink.org/student_mat/index.asp
Online activities such as flip books, acrostic poems, and puzzles for K-12 students that support literacy.

Count Us In Math
http://www.abc.net.au/countusin/default.htm
Games designed to help students understand basic number concepts.

Illuminations Tools
http://illuminations.nctm.org/tools/index.aspx
Practice you math skills by playing one of the many interactive games.

Electronic Abacus
http://illuminations.nctm.org/tools/tool_detail...

National Library of Virtual Manipulatives
http://nlvm.usu.edu/en/nav/vlibrary.html
Interactive, web-based manipulatives for mathematics instruction

Math Web Tools
http://illuminations.nctm.org/tools/index.aspx

Cool Math
http://www.coolmath.com/fractions/index.html
Learn all about fractions at this interactive website.

Journey North
http://www.learner.org/jnorth/
Learn about wildlife migration and seasonal change.

Creature World
http://www.pbs.org/kratts/world/content.html
Click on a map of all the world’s continents to research animals from around the globe.

Biomes of the World
http://mbgnet.mobot.org/
Read about the plants and animals in biomes from around the world.

Habitats: National Geographic
http://www.nationalgeographic.com/geographyacti...
Each of the Earth’s habitats is described in text and illustrated with beautiful photographs.

E Species Fact Sheet
http://www.kidsplanet.org/factsheets/map.html
Information for over 50 species of animals.

I know that Science
http://www.iknowthat.com/com/L3?Area=L2_Sci...
Fun science games to help teach space, animals, and physics.

InfoNation
http://cyberschoolbus.un.org/infonation3/basic.asp
Create bar graphs to view and compare statistical data on countries around the world.

PBS History
http://www.pbs.org/history/

Library of Congress: WiseGuide
http://www.loc.gov/wiseguide/indexflash.html
Published monthly, this site highlights the many fascinating, educational and useful resources available from the nation's library.

History Detectives
http://www.pbs.org/opb/historydetectives/
Explore the complexities of historical mysteries, searching out the facts, myths and conundrums that connect local folklore, family legends and interesting objects.

Experiencing War
http://www.loc.gov/vets/stories/voicesofwar/
Stories from the Veterans History Project.

National Geographic: Expeditions
http://www.nationalgeographic.com/xpeditions/hall/
Interactive “museum” that takes you on geography journeys.

American Experiences Archive
http://www.pbs.org/wgbh/amex/archives_themes_b...
Stories of the people and events that shaped this country.

Eyewitness to History
http://www.eyewitnesstohistory.com/
Your ringside seat to history - from the Ancient World to the present.