your essay should have a clear argument. This means you will need to decide whether you agree or not with the statement above. Whilst you may wish to touch on ethical aspects of work with animals, you should not become side-tracked by this. Your essay must give at least four examples of animal models/studies from Books 2 and 3, and can include supporting material from Book 1 and the multimedia map. Of the marks available, up to 4 marks can be gained for the content of your introduction and conclusion and your tutor will award up to 8 marks for essay structure (i.e. a clear introduction, conclusion and appropriate paragraph structure), clarity and appropriate referencing. If you are unsure how to structure your essay or reference sources, please see the relevant resources on the Skills for OU Study web page and the Library Service’s guidance on the OU Harvard referencing style.