Some tips: 1) Remember: these are general topics; avoid using the personal pronoun "you" and only use "I" to express your opinion/final thought in the conclusion. 2) Do some research so that you can support your argument with facts and examples.
1. Compare and contrast the education system in Thailand with another country in the world. Research the topic so that you can give "real world" examples.
2. Discuss the advantages and disadvantages for society of spending one day without a smartphone.
3. What are the main problems facing teenagers today? Give plenty of examples and suggest solutions.
4. 1% of the Earth's population now have more wealth than the other 99%. Do you think it is an acceptable situation or unacceptable? Give reasons to support your argument.
5. What are the best ways to stay healthy in life? Explain them with plenty of examples.