Here are some example introductions for 3 different types of essay. My technique is to write 2 sentences:
- A sentence to introduce the topic
- A sentence giving a general response to the question or instruction
Problem & Solution Essay:
It is true that children's behaviour seems to be getting worse. There are various reasons for this, and both schools and parents need to work together to improve the situation.
Discussion (& Opinion) Essay:
People have different views about how children should be taught. While there are some good arguments in favour of teaching children to be competitive, I believe that it is better to encourage co-operation.
Opinion (Agree / Disagree) Essay:
In recent years it has become more common for women to return to work after having a child. However, I do not agree that this has been the cause of problems for young people.
Keep your introduction short. Main body paragraphs are more important.