www.teachingtables.co.uk: Some very good games to play to help with mental maths. Again subscription needed to get full benefits of site! Cd rom of site can be purchased.
www.multiplication.com: Excellent interactive games. No subscription needed. Contains other useful resources.
www.primaryworksheets.co.uk : An excellent site with lots of good worksheets to print off. By clicking on change, this generates a new sheet. Good assessments.
www.nrich.maths.org.uk : An excellent site for problem solving and thinking skills. No subscription required. Key stage 2 site.
http://www.coolmath-games.com : An excellent, colourful site which would appeal to all pupils containing maths games, games for concentration, etc. (Contains a lot of reading and a child with reading difficulties would need someone to help guide them through it. ) Key stage 2 site.