Have posted tons on this here on MN. Absolutely cannot praise this programme highly enough....
DD1 finished Y2 with Nc L1 at KS1 SATs. She was unable to even take 1 from 10 and could barely add numbers to 20.
We were in utter despair. And the school were less than helpful. We asked for suggestions about what we can do at home. School responded 'Children develop in mathematics at their own speeds.' We asked if they could recommend any workbooks. School responded 'As a policy, we don't recommend workbooks and believe that 'family time' is truly more important than learning to subtract'. We queried when they expected a child to understand how to take 1-9 from 10 (as DD1 was totally unable to do this in May of Y2). We were told they were teaching to the National Curriculum and given a copy of the National Curriculum (old version) booklet.
It turned out that Carold Vorderman was publicising starting up mathsfactor so I thought why not - it's a free trial period of 1 month - can't hurt?
Mathsfactor was straightforward, well structured and worked concepts through - step by step with lots of repetition so that it wasn't a case of you've been introduced to the idea of dividing by 10, but was a case of by the end of the unit you can divide by 10 with your eyes closed.
DD1 finished Y6 KS2 SATs on NC L6 for maths. She did both the arithmetic school and the algebra school. For us it was a solution to a highly unambitious maths curriculum from the primary (where division - even inverse multiplication facts were not taught) - but it was also about providing an opportunity to practice and develop facility with basic mathematical operations (addition/ subtraction/ multiplication/ division).
Absolutely worth every penny - and now that it's even cheaper (now £9.99 instead of £14.99) - frankly at 5 homeworks a week - that's a little less than 50p a session.
My advice is go for it - you have absolutely nothing to loose. If it isn't for you - well there it is. But there's a free trial period - so why not give it a go.