Visual Maths - Virtual Manipulatives

Illuminations - choose by year group

https://illuminations.nctm.org/Search.aspx?view=search&type=ac

Cuisinaire Rods

http://nrich.maths.org/4348

Printable resources, grids etc

https://nrich.maths.org/8506

Seconary Manipulatives

https://nrich.maths.org/13583

Primary Manipulatives

https://nrich.maths.org/13881

Amazing Posters

https://nrich.maths.org/posters

National Library of Virtual Manipulatives - doesn't look inviting, but really useful.

http://nlvm.usu.edu/en/nav/grade_g_1.html

Excellent selection of whiteboard manipulatives

http://www.teacherled.com/all-interactive-whiteboard-resources/

Number blocks
up to 10 per block

http://www.mathplayground.com/mathbars.html

Telling the time

http://www.teacherled.com/time/

Compare fraction, decimal, percent

http://www.abcya.com/fraction_percent_decimal_tiles.htm