ChatterBank6 mins ago
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For more on marking an answer as the "Best Answer", please visit our FAQ.I have a few ideas, but my suggestion and the best place to go is to check out BBC bitesize, there's a section called 'sos teacher' and if you post on there, or read some of the existing stuff you'll find what you need. I'm presuming you're doing science coursework, and if you are, that is the best place to check.