Addition

Addition using a structured  number line  (with numbers on) http://www.ictgames.com/numberlineJumpMaker/index.html

Addition using an unstructured number line (without numbers)

Addition using number bonds

 http://www.ictgames.com/catapultCountOn/index.html

Vertical addition

http://mathszone.co.uk/calculating/

 

Subtraction

Subtraction on a number line

http://www.ictgames.com/numberlineJumpMaker/index.html

Expanded method of subtraction

http://mathsframe.co.uk/en/resources/resource/242/Column_Subtraction_using_Place_Value_Counters

 

Vertical subtraction

http://mathsframe.co.uk/en/resources/resource/48/column_subtraction

Multiplication

Multiplication as grouping

Multiplication using arrays

http://www.mumsnet.com/learning/maths/what-an-array-means-in-maths

Multiplication using the grid method

http://www.bbc.co.uk/bitesize/ks2/maths/number/multiplication/read/4/

Vertical Multiplication

http://www.bbc.co.uk/bitesize/ks2/maths/number/multiplication/read/5/

Division

Division as sharing and grouping

http://www.topmarks.co.uk/Flash.aspx?f=grouping

Division on a number line (video)

https://www.youtube.com/watch?v=_K_EcLUnv6k

Division as chunking

http://www.chunkydivision.co.uk/activity/index.htm

Short division

http://www.bbc.co.uk/bitesize/ks3/maths/number/multiplication/revision/3/