The NSP, set up in May 2004, currently has around 650 schools participating in its scheme, and has already signed up Truprint and Cotswold Outdoor.
The NSP is planning a special initiative in schools in NTL's service area that will see schools communicating the benefits of broadband to parents, backed with a special offer from NTL.
The offer, only for customers signing up through the NSP, includes a £10 donation to their school. The package also offers an additional £15 credit back to customers on their third month's bill.
Steve Perry, marketing services director at NTL, said: "NTL is very much a family brand providing families across the UK with a unique low-cost range of products and will be a perfect synergy with The National Schools Partnership."
Mark Fawcett, chief executive of the NSP, said: "We are delighted to welcome NTL on board and look forward to a long-term working relationship which we hope will increase brand awareness for NTL and assist schools with much-needed funding."
Fawcett confirmed that the NSP is negotiating with around 17 brands including manufacturers and retailers to participate in an affinity scheme to be launched in May 2006. The brands would be able to use the NSP logo on their packaging, demonstrating their support for NSP-linked schools.
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