The following sites should be of interest.
www.incompetech/graphpaper (Graph paper of all types. Choose dot paper and accept all default settings except 'grid line weight' which you should set to something around 1.50 to make your dots sufficiently dark.)
Virtual manipulatives: NCTM Illuminations:
www.arcytech.org www.matti.usu.edu http://illuminations.nctm.org/
Triangular dot paper (and other things):
www.matheverywhere.ca
Go to the Blackline Masters menu option to see all that is available in PDF
format.
Nice angle measuring applets: www.amblesideprimary.com/ambleweb and then choose 'Numeracy Hour' from the menu on the left. Browse the page for the applets.
CGI Powerpoints Labelling similar figures Definition of measurement Two types of measurement Quantities in Algebra
Fall 2005 Class Data for Statistics Pick's Theorem Applet Rotational Symmetry (GSP)