How would I begin revising for the critical essay in the advanced higher English exam?

If you already know the text, I would begin by taking a past paper and going through all relevant questions, summarising how you would answer each one. Set a time limit - you’ll have about 30 minutes to plan in the exam.Perhaps set out a structure - a beginning sentence which demonstrates what your conclusion will be, a topic sentence for each of the paragraphs and a quote for each of these. Remember, refer back to the question in each paragraph. Use the quote as an example of your point, then follow with analysis of the quote or the scene it is from (if it isn’t a poem) to say why this evidence supports your conclusion.