The IELTS Task 2 writing question can be very challenging. Not only is it a test of your grammar and vocabulary, it also tests your ability to analyze and answer the RIGHT question.
Students can sometimes write well on a topic but get a low score. This is usually because they are answering the WRONG question within the topic presented to them.
This is a real example from an essay a student gave me before we started his course.
Question
Using a computer can have more negative effects than positive effects on your children. Do you agree or disagree?