In the following post you can find ten (10) IELTS speaking prompt cards. You can even practice on your own. Make sure that you don’t exceed the two (2′) minutes when you answer: IELTS 10 Speaking promt cards
As you very well know the first part of the IELTS composition is the description of a kind of chart / graph. The following worksheet can help you practice some useful expression that are applicable to almost any IELTS situation: IELTS Useful Language for the description of graphs
Good Luck with your Exams.