Here are some great first grade links for some fun academic practice:
Links:
http://www.scholastic.com/home/
Math Links:
http://oswego.org/ocsd-web/games/mathmagician/maths1.html
http://www.funbrain.com/math/index.html
http://www.quia.com/mc/4918.html
http://www.coolmath-games.com/numbermonster/index.html
Count Hoots Numbers Game – http://www.bbc.co.uk/schools/laac/numbers/chi.shtml
Math Magician – http://resources.oswego.org/games/mathmagician/cathymath.html
Aquatic Speedway – http://www.fun4thebrain.com/subtraction/subaquatic.html
Subtraction Snowball – http://www.fun4thebrain.com/subtraction/snowballFightSub.html
Sum Sense – http://resources.oswego.org/games/SumSense/sumsub.html
Ten Frame – http://illuminations.nctm.org/Activity.aspx?id=3565
100 Chart Splat –http://www.primarygames.co.uk/pg2/splat/splatsq100.html
Student Math Handbook – www.pearsonsuccessnet.com
Science:
http://www.pebblego.com/login.php
Social Studies:
http://www.whitehouse.gov/kids/whlife/index.html
http://www.nationalgeographic.com/kids/
http://www.pebblego.com/login.php
Eric Carle:
http://www.eric-carle.com/home.html
Just For Fun:
http://www.eduplace.com/kids/mhm/brain/gr2/
http://www.lego.com/en-us/default.aspx