I'm so sorry to say that Insights really sucks. Do you know why? If you can answer my questions then you'll probably know the answer.
Why is that in each of the three books there's a MATE member? Why isn't there any other teacher who probably has done all his best to produce a comprehensive book rather than the stuff we have there? I know people who submitted books to the textbook committee but were not selected why?????? It's because of the monopoly of MATE of everything that revolves around English in our country .