First, you must think about your purpose. You can legally use another's work if you are using it for: teaching, research, news reporting, parody, commentary or criticism. Using the work in a classroom where only students have access to it makes a stronger case for you to rely on the fair use rules. Please note: You cannot use the fair use rules if you are producing a commercial or entertainment project. You cannot make any money from your project, and you must always cite your work properly.
What is your project? Why are you working on it? To rely on the fair use rules, make sure your project has clear classroom or research objectives, and that it is not a purely creative endeavor.
How much of the copyrighted content will you use? There are three things to keep in mind. First, the material you use should be just a small portion of the original work. Second, the content you use should not be a central component of the original body of work. Third, do not copy more than you need to achieve your educational goals.
What is the source of the material you are copying? To qualify for the fair use rules, several conditions must be met. First, the material from which you are working should be acquired legally (i.e., not downloaded illegally). Second, using the material in your project cannot impact the commercial value or market share of the work. Finally, to copy something, you must be able to successfully demonstrate that there is no way to legally license a copy of the work, or that there are only a few copies in existence and that you cannot access them.