key stages in secondary school

Key Stage (KS4)
Age 16–18. Y12–13. Sixth form secondary, FE college A-Levels, AS-Levels, NVQs, Diplomas

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Please download a copy of the Key Stage Progression Table HERE.
The complete framework and individual versions of the curriculum for primary and secondary Key Stages are available here:

Derby Virtual School works with children from foundation stage onwards. All transitions can be difficult for children in care, but the move from primary school to secondary school (from key stage 2 to key stage 3) can be especially daunting.
The Virtual School supports this transition and offers advice to schools about additional transition support for children in care.

References:

http://www.goodschoolsguide.co.uk/international/curricula-and-exams/uk-overview
http://www.afpe.org.uk/physical-education/2014-national-curriculum/
http://www.derby.gov.uk/education-and-learning/derby-virtual-school/information-social-workers-foster-carers/key-states-explained/
http://www.bachelorsportal.com/study-options/268926984/education-united-kingdom.html