Math - some of the concepts are introduced in third grade later in the year, but the games are interactive.

http://www.mathfactcafe.com - design your own timed tests

http://www.kidzone.com - practice basic facts

http://www.themathworksheetsite.com - generate your own worksheets for review

http://www.kidsnumbers.com/ - practice basic facts

http://www.aaamath.com/ - go to the 3rd grade link for games to practice math skills

http://wwww.funbrain.com/cgi-bin/mb.cgi?A1=start1&A2=0&ALG=No&Submit=Play+Ball - baseball basic facts

http://www.coolmath4kids.com/ - math problems for review

http://www.gdbdp.com/multiflyer/ - practice multiplication facts

http://www.playkidsgames.com/games/tunnel/multiply.htm - "Multiplication Blaster" - practice multiplication facts

http://www.gamequarium.com/math.htm - "Aquarium Games" - has a variety of interactive math games to play

http://www.funbrain.com/cashreg/index.html - "Change Maker" - a game to practice money skills

Science - Think about all of the science around you!  Take a moment to visit the aquarium, zoo, planetarium, etc.

Franklin Institute Science Museum 

http://www.mhscience02.com  

Simple Machines

Science Quizzes- an excellent way to test your knowledge of knowledge learned in the classroom.

Social Studies - You are living and creating history every day!

http://www.nationalgeographic.com/geobee/ax/newquizstart1.html - Geography Quiz

http://www.nationalgeographic.com/lewisandclark/ - Explorers Lewis and Clark

http://www.teachersfirst.com/summer/col-Jamestown.htm - Information on Colonial Williamsburg and Jamestown

http://www.timepage.org/spl/13colony.html - Colonial America

www.whitehouse.gov/kids/presidents - Presidential Biographies

http://www.whitehouse.gov/kids/tour/ - Tour of the White House

http://bensguide.gpo.gov/3-5/index.html - Branches of Government

Religion

www.catholic.org/saints

www.americancatholic.org

Penmanship 

Cursive Writing