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Graphs, Grids, Calendars, Manipulatives, Music, Dot-to-dot, Trapezoid, Triangles

http://www.scottbryce.com/mathwork/cgi-bin/coordinate_plane.pl  - another site now, but good math help.

http://www.mathematicshelpcentral.com/graph_paper.htm - excellent

http://www.printfree.com/School_printables.htm   a fantastic site for all kids of graph paper, calendars, clock faces, lined paper .... etc.

Line graph paper 
Grid size  Large  Medium  Small
                   HTML Graph Paper  
                   HTML Lined Paper 

http://www.2learn.ca/construct/graphicorg/graphs/graphpaperindex.html#   -outstanding as well

http://www.incompetech.com/beta/plainGraphPaper/custom/centimeter-blue.pdf  a PDF of 1cm Graph paper

http://www.abcteach.com/GraphicOrganizers/graph.htm  More of a class list

http://mason.gmu.edu/~mmankus/Handson/manipulatives.htm   this is a great site for all kinds of maths  manipulatives. See below.