My structure is intro, thesis and anti-thesis (point 1, point 2, point 3, ...) and conclusion (synthesis/ evaluation). (Aka T-A-S structure)
Intro: define concepts and key terms (eg. Define perfect comp/mono/price discrimination etc.)
Thesis (aka “FOR”)
Para 1: point 1 (answer the question) examples explanation link to qn
Para 2: point 2 (PEEL)
...
Anti-thesis (aka “AGAINST”)
Repeat thesis structure
...
Conclusion: your stand, evaluation, key takeaways/ insights (my personal fav is bringing in Tinbergen Theil theory of economic policies and Okun’s leaky bucket theory). Evaluation and insight is apparently v important.
For 15m: you need min 3 points (inclusive of for and against for balanced argument so 2 for 1 against or 2 against 1 for)
For 25m: you need min 6 points to talk about, but 25m requires the first half of your points to explain the concept and the last half is argumentative (eg. If the question is “Evaluate which policy is the best in correcting the above market condition. 25m” I would discuss how FP, MP and supply-side policies solve the said market conditions first, before stating my arguments)
You may be asking why I didn’t include my stand in the intro — most students may be unclear of their stance in the beginning and end up contradicting themselves so it’s safer to write your stand only at the end when you’re clear of what you’ve written.
DISCLAIMER: This is definitely not a model answer but its what I typically use. Hope this helps. You should really clarify with your teacher because they’re marking your internal exams and if your entire school uses the same structure, it wouldn’t really ring an alarm bell for the examiners during the actual exams. Good luck!