State school pupils are to get extra help with science, maths and language lessons from private school teachers, education ministers have announced.
State-private partnerships already involve 1,200 schools
Lord Adonis said he hoped the £2.2m project would encourage state school pupils to continue their studies in these core areas after GCSE.
The 18 new partnerships between 160 state and independent schools will feature master classes and workshops.
Other such partnerships have involved more than 1,200 schools since 1998.
Appliance of science
Schools minister Lord Adonis said: "These partnerships are contributing to increasing attainment in key curriculum areas.
"Each will aim to provide exciting opportunities for their pupils to encourage them to continue their studies in these subjects at GCSE level and beyond."
Among the projects being funded are a partnership in York City and one in the London Borough of Southwark.
The York-based scheme will focus on raising pupils' awareness and understanding of the application of science skills in all areas of life.
Experts will give master classes and workshops, reflecting the contribution that science makes to the community, the arts and heritage of York which is designated a science city.
The London-based partnership is a tie-up between independent James Allen's Girls and four state schools.
It focuses on modern languages and in particular will provide a network for the teaching of minority languages, including Oriental languages.
It also aims to boost the number of students opting for extended science courses at GCSE and to increase the number of girls taking physics at all levels.