A Level Biology: Interesting article on scientific studies

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This article from Science, debating current research revealing links between Chronic Fatigue Syndrome and viruses, does a good job of highlighting how the scientific community self-regulates. It discusses research protocols such as sample selection and demographics, faults such as contamination and bias linked to commercial interests. I think it makes a good up to date discussion of how scientific studies are carried out and the need to produce clear and detailed articles. It is an easy read too and I highly recommend it:

Chronic Fatigue Syndrome Attacked Again

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Fantastic new A Level revision guides and also IGCSE workbook now available

Every so often I have a wander through Amazon to see what is available. I am amazed at the explosion of textbooks available, particularly for IGCSE. For example I havejust discovered that there is a workbook to match Mary Jones new, and extremely good, textbook. I certainly will be ordering it.
There are more A Level text books also being produced for the new specification, especially two sets of revision guides both of which I recommend. I have created an E-Store that has all the relevant textbooks for Cambridge IGCSE and also Edexcel A Level. I will add other categories for other exam boards soon.
In the meantime please have a browse through my E-Store. If you fancy buying book or two that would be great. The order will go through Amazon and will not affect your purchase price if you go through me. However I do receive a small amount of money for each book purchase through my E-Store (all going towards my daughters college fund). If you can get your school to do bulk orders through me that would be absolutely wonderful!

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A Level Biology: mutations PowerPoint presentation

This is a short and simple presentation to illustrate the dfferent types of possible mutations. A lot of simple animations and short informative information slides. The last summary slide can be used as a verbal summary or as a written activity for the students.

Link to presentation:

mutations

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AS Level Transport across the membrane: Osmosis

This is the second in the transport across the membrane series of PowerPoint presentations. I am quite proud of some of the explanations and animations here. There is also a supporting video using the same presentation which maybe useful to watch (so you can see how I would explain each slide). This was originally written to support the concept approach Edexcel textbook but it can be used for any A level syllabus. There are integrated questions to encourage the students to apply the theory.

PowerPoint Presentation:

transport-across-the-membrane-osmosis

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Transport across membranes: Diffusion and faclitated diffusion

This is a PowerPoint presentation on transport across the membane, focusing on diffusion and facilitated diffusion only. This was originally written to match the concept approach (green) Edexcel textbook.There is a matching video available using this presentation. You can make the animations repeat by simply scrolling backwards by one click with the mouse. I am not too happy with one of the examples of facilitated diffusion animations but it gives th idea of a conformational change.

transport-across-the-membrane-diffusion

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