Graded readers can be used in many ways. Of course, the most common way is for students to read books individually. This allows students to select books that are of interest to themselves, but perhaps not to the other students. This kind of reading is normally done outside of class time since it does not require a teacher and needs much more time than is possible during normal class hours.
The most common meaning of “class set” is to have multiple copies of the same book so that everyone in the class can read the same story. Having all of the students read the same book, does have its advantages. You may have them all take the book home to read “extensively” but then in class, you can use the text for close reading to illustrate specific grammar points, vocabulary usage, or delve into the literary aspects of the story, guided by the activities you prepare, or take advantage of the activities provided in the text, such as those in the new Marvel series. You might even ask the students select their own activity from the “after you read” activities to share with the class.You may also make class sets of books that are all of the same level, such as a sufficient number of the Pearson English Readers “EasyStarts, ” so that everyone can select a different book, that can be read completely during class time.
Students are formed into small groups of 4-6, and either assigned, or choose a book to read. Each student is assigned a specific role such as “leader,” “vocabulary master,” “character master,” “question maker,” “reporter” or “illustration commentator.” The students prepare individually and then in the next class, discuss what they have found with the others in their group. An extension of this activity would be for the reporter in each group to give a brief presentation to the entire class.
I have had great success with the students doing brief presentations on their favorite book using a “carousel” approach. I put them into groups of 4 to 5. One student in each group shows his/her book to the class and describes the basic plot, their favorite character and something new that they learned from the text. After 3 minutes or so, the presenters rotate to the next group (in a circle) and repeat their talk, thus getting additional speaking practice based on their reading. After they are done, they return to their original group and the second person in the group does the same thing. You may have the students talk to a third or fourth group, but you need to allow sufficient time for every one in each group to have a set of turns. The students can use an evaluation sheet with a rubric with such items as “interest,” “degree of preparation,” “speaking without reading,” etc. that they can turn into you at the end of the class, or if they all have mobile devices, perhaps use peereval.mobi that allows them to assess and comment on the other students' presentations based on a rubric that you devise.