White House for Kids http://www.whitehouse.gov/kids/whlife/index.html
National Geographic for Kids http://www.nationalgeographic.com/kids/
Great ideas/activities by the month & for holidays http://www.apples4theteacher.com/holidays/
Scholastic Census; practice learning about The United States of America. http://www.scholastic.com/census/game1/index.htm
Math practice for second grade http://www.ixl.com/math/grade/second/
Government for K-2 http://bensguide.gpo.gov/k-2/index.html
Games and videos across the curriculum http://www.primarygames.com/
Around the World http://www.kbears.com/geography.html
Science Concepts http://www.fossweb.com/modulesK-2/index.html
learning games across the curriculum http://www.learninggamesforkids.com/