The introduction should tell the reader what to expect in the essay. The introduction should make clear to the reader the focus of the essay, the scope of the research, in particular an indication of the sources to be used, and an insight into the line of argument to be taken.
While students should have a sense of the direction and key focus of their essay, it is sometimes advisable to finalize the introduction once the body of the essay is complete.
For a world studies EE the introduction is a really important part of the work. There are some things that must be included in the introduction
Why is this topic significant and why should it be investigated?
How does your research question link to your local manifestation?
Why are the two IB subjects that you are doing the essay in relevant to the research question?
What are the specific methods / concepts / models / theories that will be used from each of the IB subjects?