From National Stem centre, resources arranged by topic area including practical work and videos. Lots and lots here.
Bioethics Education Project site includes content and lesson plans on various ethical issues all linked to relevant sections of A level specifications.
From the Wellcome trust – resources formerly known as “labnotes” are pdf files on various new biotechnology issues – also available to order as printed copies.
A US site which uses case studies to provoke discussion of controversial scientific issues e.g. cloning and DNA fingerprinting
Worksheets from teachers site (US) – also links to interactive sites and diagrams/images
Good selection of resources for various A level topics – includes worksheets, powerpoints, interactive diagrams, practical work etc.