I am so glad to read your lessons. It is helpful for me. Of course, i am being taught IELTS strategies by a teacher in my town. She taught that there are 4 types at task2 on ielts writing.
first- Advantage or disadvantage-in this type, i should at least 2 examples for 2 side and there can be opinion or not.
Second-Opinion-we just give own opinion and make conclusion at the end
Third-we analyze the issue and give solutions, at least 2
Forth-discussion-we should analyze two sides and no opinion, if asked give opinion, can give own opinion.