To write well, you need to think about who you are writing for. In reality it might only be your teacher who reads the email or postcard that you write in an exam, but it really helps to imagine that you are writing to a real person. So, think carefully about who is going to read this type of writing. Don’t just think about your teacher, think about a 'real' reader. You will get a better mark if you choose the right style and include interesting ideas.
Are you writing a report for your headteacher? You will need a clear and formal style.
Is it a magazine article? If it’s for young people an article can be informal and chatty.
Are you writing a blog post? If so, write about a personal experience.
Do you think about the reader when you are writing? What writing tasks do you find the most difficult and why?