So the basic structure was: introduction, chapter 1, chapter 2, chapter 3 and conclusion.
In the introduction I included a paragraph related to each chapter. I also used this section to introduce and explain key terms that will be constantly used in the dissertation. Its recommended for this to be approx 500 words, I wrote closer to 700.
Next were the three chapters. So each chapter relates to a different topic for example, my epq was on selective breeding in dogs and genetic health problems associated. I had one chapter on wolf domestication and another on kennel clubs and breed standards. So within each chapter there needs to be a debate on either yes this topic is relevant or no it isn't. I found it useful to begin the chapter with the argument that I personally agreed with as it is easier to start that way but honestly the way you order the argument doesn't matter as long as the argument is well rounded and backed up by reliable sources. Also, make sure the chapter is not clearly split with all first paragraphs being in agreement and the final being disagreement it needs to be a well balanced argument. I found the best way to do this was present an idea explain is then debate it. Then within the same chapter repeat this maybe 2 to 3 times with different ideas. Each chapter is recommended to be around 1500 words. For one chapter I wrote closer to 2000 and another I wrote around 1300 words. So again the number of words doesn't really matter; the marks come from your presentation and understanding of the information. I ended each chapter with a mini conclusion linking the information in the chapter to the main title.
Then for the conclusion, I wrote a few paragraphs basically reiterating the mini conclusions from each chapter and coming to one big conclusion.
I'm not sure if everything i've just said makes sense so if you need any clarification let me know. Also, if you need help with any other aspects of the EPQ, i'm happy to help!