Below is an example paragraph and plan as to how to answer a 20/30 mark question. Remember, examiners are human and there are always discrepancies with marks and examiners disagreeing with each other, however, if followed this template allows students to easily access to top band.
The structure I use is PETAL. It is important to note that there are many different structure out on the internet and realistically, you don't need a specific ones - just something. P - point, E - explain your point in more depth, T - Apply theorists A - Analyse L - Create links.
You should have 3 of these for a 20 marker and 4 for a 40. You must also have an introduction and a conclusion to get into a good band. What to include in these is outlined below: Intro: Look at what the question is asking you to do. What are the key concepts that need defining. E.g. In the example below (Functionalist essay) define consensus and conflict theories. Why is this question important? Signpost what you are going to look at. Conclusion: Answer the question directly and clearly. Start with overall, in conclusion etc. In the example below (Functionalist essay) you should state directly to what extend is the Functionalist argument accurate in today's society.
You may also be interested in buying the mind map template which allows you to create plans for any 20/30 mark question easily for you to memorise.