The students should be given the guidelines that they will try to follow for this activity. Ideally this should occur when the activity is explained to them. This way, when it comes time to assign a grade the students will know what is expected of them. When assigning a grade the teacher can assign a grade by evaluating how well the students meet each of the individual guidelines. The material they read should have some scientific value.
Students can bring articles of interest from their favorite publication.
Some materials will be provided, but the library is a wonderful source for more literature.