Recently, when I needed to prepare a lesson on IELTS Speaking part 3, I found the materials at this website very useful:
IELTS Speaking Part Three worksheets

In particular, in my lesson I used this worksheet: IELTS Speaking Part Three typical questions and answers, which led-in very nicely to the follow-up worksheet: IELTS Speaking Part 3 Questions Stems.

Between those 2 worksheets, I was able to fill up a 2 hour lesson quite easily.
Also, I found this worksheet: Opinions about the IELTS Speaking Test, to be a nice warmer.

[I'm posting these resources here because I'm using my blog to keep track of all the useful material that I've used in my lessons.  I'm also indexing that material here and here.]