National STEM Center (UK) http://www.nationalstemcentre.org.uk

Nuffield Foundation  chemistry  http://www.nuffieldfoundation.org/practical-chemistry 

                                  biology     http://www.nuffieldfoundation.org/practical-biology

                                 physics      http://www.nuffieldfoundation.org/practical-physics

i-Bilogy   http://i-biology.net

Royal institute channel 

http://richannel.org

 

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