Math
Math Facts
Math Manipulatives
Sudoku (Jigsaw-Sudoku)
That Quiz - various Math tests
Measurement
Measure It
 
Links Learning - Illustrated Lessons
(Estimation of Length, Place Value, Line Symmetry, Patterns, Weight and Capacity, Tangrams)
     
Money
Adding Coins
Money Desk - Counting Coins
Counting Change (word problem - matching)
     
Time
Telling Time (use Level 3 for hour, half hour and quarter hour intervals - there is also "elapsed time")
     
Science
Foss Science Website
Science Clips (from the BBC)
Plant Website (The Great Plant Escape)
Yahooligans! Space Page
Ranger Rick - Animal Research
Animal Planet - Animal Research
Animal Facts - Animal Research
Animal Websites for Elementary Research
Kid's Planet - Animal Research - Especies Fact Sheet
Kidzone Animal Facts
The Food Chain Game (Rags to Riches)
     
Social Studies
Native Americans
Native Americans - from ThinkQuest
Edward Curtis' American Indians
World Geography
     
Other
Flat Stanley
     
For Fun
I Spy in the City from Scholastic
I Spy in the Library from Scholastic
     
Typing Practice
Keyboarding Practice
Computer Circus
  Typing Games (and lessons) but the games are fun - and free