Material Detail

I think English Banana has a variety of resources such as quizzes, worksheets, and videos. I really like some of the material for teachers, because I see I can use them in my classes (some worksheets are well designed). However, there are files that seem not to have a purpose. I wonder if some of them are uploaded at random. For example, I see that some pages of a textbook are uploaded, but I cannot see the purpose. Also, there is not a sequence to follow between topics or the classification of these topics is kind of confusing, so it may be difficult for the teacher to find resources related to his or her needs.