Spire Maths is a free mathematics site full of teaching resources primarily for secondary teachers of mathematics, though it does contain many resources for primary teachers. 

It is run by Dave Miller who worked for many years running teacher education and mathematics teacher education courses at Keele University.

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How can the use of an interactive whiteboard enhance the nature of teaching and learning in secondary mathematics and modern foreign languages? (2005): Miller, Glover, Averis and Door
Originally published by Becta as part of their ICT Research Bursaries