size

Two articles.  4 - 6 pages each (max 8).  A "page" is a screen bite - not more than can be read on a screen at one go.

target group - your audience

Young people about your age.  They should find it informative and interesting.

form

Your two articles are supposed to be viewed on the screen.  You can choose to do this in one of three different ways.  A web site - which seems the obvious choice; but also a presentation (Power Point) or as a Word document.

layout

There will be a good deal of text.  You decide whether you want (or you have time for) pictures, sounds etc.  It is important that the text is easy to read.