Nova Scotia Education (Canadian Education Department) have a range of free Mathematics Blackline Masters  on their website which teachers can access. You can download the resources as word documents and edit them or simply download the PDF version. Examples include blank clocks that students can draw hands on, base 10 MAB block cut outs, paper backgrounds (ie dot, isometric), fraction circles/strips/pieces and number charts. Source: Kathryn Beilby, St Aloysius College

In addition, I’d like to suggest teachers visit Math-Aids.com. This is a fantastic free site that allows you to generate your own worksheets. I have blogged this site previously and I am a regular user of this site.