3. The bands focus on how a position is presented, extended and supported, how ideas are arranged, whether language is used naturally and fluently to achieve the writing purpose

When preparing students for IELTS writing, ask them to write an outline to explain their opinions and provide them with cohesive devices that can be used for their later writing.

Maybe a brain storm and a mind map may be of some help

 1. The bands focus on four points: task response, coherence and cohesion, le*cal resource and grammatical range and accuracy.

2. From the Band descriptors, we can tell students to prepare the exam from this four points. For example, for the task response, we should require students to ansewer all the questions in the directions and give the supportive information to show their ideas. For the second point, we should tell students to organize infomation logically and clearly.

3. Do more exercises on graph or chart writing, and try to make students  familar with different kinds of graph and chart writing, the peak and valley of the trend, the focus and so on. 

3 focuses: vocabulary, coherence and cohesion, opinion

we have to preapre students with ways to express dialectic concepts.