Hi Bibby
By the way I thoroughly enjoyed your Bill Gates worksheets!
Also I have taught TOEFL and IELTS. First you need to know if your student is doing general IELTS or the Academic IELTS. Your lessons will change depending on which your student is working towards.
Next, the best place to start is the IELTS website which provides a lot of good teaching materials and will explain how the exam is structured so that you can prepare the student for it`s structure. Here is the link to the IELTS site.
There are lots of other sites that provide practice for students which you can provide for your student.
I could say more but I dont want to take up a lot of room on the forum so I`ll PM you the rest