Here are a few fun websites designed to help students build on lessons learned in class. These can either be done online or a project with a parent or sibling!
MATH:
http://www.internet4classrooms.com/skills_1st.htm
http://www.education.com/activity/first-grade/math/
READING:
http://www.education.com/activity/first-grade/reading/
http://www.starfall.com/
SCIENCE:
http://questgarden.com/95/26/3/100128120224/
http://www.education.com/activity/first-grade/science/
RECOMENDED READING:
http://www.nisk.k12.ny.us/birchwood/recrdng1.html
http://www.greatschools.org/cgi-bin/showarticle/623