How would I approach a source question?

Approaching source questions, whilst they may seem daunting, are reasonably straighforward. You use the simple PEA/PEE structure, whilst also taking into account the nature origin and purpose of the source. Generally, the sources will provide you with the general topic they want you to focus on, however don't overly rely on it and use your own knowledge where necessary. Most of the shorter source questions will be asking you to evaluate the uselfulness of the source in explaining a certain subject, in which case you should aim to cover at least one strength and one weakness (if you have time then you could cover another paragraph, depending on which side there is more evidence in favour of). 

With the longer source questions, an essay structure is required. It is the same apporach however, some of your evidence should draw on the information with the sources. Such questions usually require some sort of comparison and, generally speaking, will have 2 sources leaning in agreement or disagreement and 1 source the other way, making it easy to spot which is which. With these essay questions, there is little focus on the sources and more emphasis (and marks) and put on your ability to use them in support of your own essay structure. Aim to write 4 points (5 if you have time), but generally examiners would rather have depth as opposed to bredth. 3 really well expained points could do better than 5 poorly explained, brief points.