This can be a very helpful thing for a teacher. I know that throughout the year teachers accumulate tons of papers, and sometimes feel overwhelmed by all of the papers on their desks. Using this bin can help a teacher feel less like they are swimming in papers, and feel more relaxed because they have a good system that works for them. Also this is a good way for a teacher to not lose any papers.
Classroom organization is important! My teacher binder helps me stay organized all year. Here are some of my favorite tips and ideas for putting together the best teacher binder. (I can't live without #5)