What is the final defence?
The final defence is the last step of an individual project. You present your work to a panel (teachers, sometimes experts or other students) and answer questions. The result of your project may be a paper (research report), a product, a model, an event (for example a clean-up drive) or an artwork. Whatever the form, you show it, explain how you made it, and prove that it reached your aim.
Plan a timed talk
Schools usually give a time limit, often about 7 to 10 minutes: check yours. Split the talk into five parts:
- Aim (1 to 1.5 min): your question or goal and why it matters.
- Method (about 2 min): what you did and how.
- Results (the longest, about 3 min): data, charts, photos of the product, what you found.
- Conclusion (1 to 1.5 min): did you reach the aim? What are the limits?
- Next step and thanks (about 1 min).
Time = number of slides × time per slide. Aim for about one minute per slide.
Make clean slides and show the product
One idea per slide. Use a short title, one large picture or chart, and a few key words. Use big letters (at least 24 points), strong colour contrast, and your own photos, charts and results. Do not read the slide aloud: look at the panel and talk. Show the real product, model or artwork if you can, and for an event show photos and numbers (how many people came, what changed). Give credit to every source you used.
Answering questions
Panels ask questions to check that you understand your own work. Prepare short answers to: Why this topic? Why this method? What went wrong? What would you change? What did you learn? What was your own part (if you worked with helpers)? Listen to the whole question, take a breath, answer in a few sentences, and give an example or number. If you do not know, say so calmly and say how you would find out. Never make up an answer.
What the panel looks for
Your school gives the exact criteria. Typical ones are: (1) clear aim and topic, (2) the work done and the method, (3) results and analysis, (4) quality of the product and the report, and (5) the talk and the answers. Throughout, your independence should show: your project log, your data and your own words. Hand in the report and any needed files on time.
Try it
Practise 3 times. First alone with a timer, then in front of a family member, then in front of two friends who ask 3 questions. After each round write one thing to keep and one to fix. In the 3D above (step 5) set the slider so that your talk is under the limit and the pace per slide is about one minute.
Key formulas and definitions
- Talk time = aim + method + results + conclusion + next step
- Time per slide = talk time ÷ number of slides (aim for about 1 min)
- Percent over the limit = (talk − limit) ÷ limit × 100
- Structure: Aim, Method, Results, Conclusion, Next step
Worked examples
1. Your talk has parts of 1.5, 2, 3, 1.5 and 1.5 minutes. What is the total, and does it fit a 10-minute limit?
1.5 + 2 + 3 + 1.5 + 1.5 = 9.5 minutes. It fits the limit with 0.5 minute to spare.
2. You have 9 slides and a 9-minute talk. What is the time per slide?
9 ÷ 9 = 1 minute per slide. This is a good pace.
3. What share of a 9.5-minute talk is the results part (3 min)?
3 ÷ 9.5 × 100 = 31.6% (about). It is the longest part, which is right.
4. A rehearsal takes 12 minutes but the limit is 10. By what percent are you over, and what can you do?
(12 − 10) ÷ 10 × 100 = 20% over. Cut details from the method, remove slides that repeat each other, keep results long and rehearse again.
5. The panel asks: "What went wrong in your project?" Give a good answer for a plant experiment.
For example: "One plant got too little water in week 1, so one result was far from the rest. I noted it in my log, repeated the measurement and reported both. Next time I would use a watering schedule." This is honest, short and shows learning.
6. Your project is an event (a clean-up drive). What should you show at the defence?
The aim, how you planned and invited people, photos, numbers (how many people, how many bags of waste), what changed afterwards, what went wrong and what you would do next time.
Common mistakes
- Reading slides aloud. The slide supports you; you speak to the panel.
- Too many slides or too much text. One idea, one picture per slide.
- No practice with a timer. Talks that are too long get cut off and lose the conclusion.
- Guessing an answer when you do not know. Say so calmly and say how you would find out.