Download integer worksheets from this site:
http://worksheetplace.com/index.php?function=DisplayCategory&showCategory=Y&links=3&id=25&link1=40&link2=46&link3=25
Mrs. Glosser’s Math Goodies,TM
This site gives worksheets, exposition, and other practice, but would like to sell you a CD.
http://www.mathgoodies.com/lessons/toc_vol5.html