by The Open University
Available in 48 free installments
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If you explore all the resources and activities in this unit, you might need to allow between two and nine hours to complete it.
Before you read this guide, why not use the self-assessment questions on the next screen to rate your current level of knowledge?
Print or save these questions and for each question, mark the most appropriate number on the scale. When you have finished, you can review your answers. A score of three of less might indicate a gap in your knowledge or understanding, and you may want to pay particular attention to these areas when you work through the guide.
Except for third party materials and otherwise stated (see terms and conditions), this content is made available under a Creative Commons Attribution-NonCommercial-ShareAlike 2.0 Licence
