First in Math: See the inside front cover of your assignment book for login and password. http://www.firstinmath.com
Study Island: Use your school login with "@97" and your school password. http://studyisland.com
Math games http://www.coolmath4kids.com
Online help for math concepts http://mathgoodies.com
Challenging problem solving http://www.forum.swarthmore.edu
Online resources relating to mathematics in general and to Investigations in particular http://www.christina.k12.de.us/Math/student_family.htm
Games http://www.funbrain.com
Weekly Brain Teasers http://www.eduplace.com/math/brain/
Flashcards, drills http://www.edu4kids.com
A teacher's web page with a variety of links for students and parents; games, brain teasers, lots of links to other math sites! (Use the menu on the left hand side.) http://www.crsd.org/5033011984112/site/default.asp