Figure This! Mathematical challenges for families provide interesting math challenges that middle-school students can do at home with their families. http://www.figurethis.org/index.html
NJ Department of Education list of math links http://www.nj.gov/education/njpep/classroom/classroom_resources/mathematics.html
Create a Graph website http://nces.ed.gov/nceskids/graphing/index.asp
Study Island. Test prep website. Your username is you first initial and last name @ hammarskjold http://www.studyisland.com
Sample of 2007 6th grade NJ ASK, language arts and math. Take a look at the open-ended questions. Answer key begins on page 96 of the document. Use this to check the work you did in class. http://www.state.nj.us/education/assessment/ms/samples2007/final_NJASK07_Sampler20Key_Rubric_Exemplars.pdf
Problems of the Week, previously located at Ole Miss, they are now at Columbus State http://www.colstate.edu/mathcontest/index.php
Whitehouse math intitiative http://www.whitehouse.gov/kids/math
interactive exploratory math activities http://illuminations.nctm.org/