Check here the colleagues that are part of your group and start organizing yourselves for this task.
As I suggested in class today. Your first step should be finding an example of the exam you are going to analyze. Antônio has exemples for TOEFL, CPE, and IELTS. If there is anything in which I can help you, please let me know.
Group 1 - TOEFL
Group 2 - IELTS
Group 3 - CPE
Group 4 - CELTA* (we may change to TOEIC)