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We would like to thank:

Martyn Robinson-Slater, International School, Bremen

Rajbir Nandhra, Science teacher from Wolverhampton, UK

Kayleigh Rees, St Augustine’s Catholic School, Warrington

Patrick Hayes, TSL Ltd

Magda Wood, TSL Ltd

Except for third party materials and otherwise stated (see terms and conditions [Tip: hold Ctrl and click a link to open it in a new tab. (Hide tip)] ), this content is made available under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence.

The material acknowledged below is Proprietary, used under licence and not subject to Creative Commons licence. Grateful acknowledgement is made to the following:

Videos: courtesy of TSL Education Limited,

Every effort has been made to contact copyright owners. If any have been inadvertently overlooked, the publishers will be pleased to make the necessary arrangements at the first opportunity.

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