After teaching a focus lesson on writing descriptive sentences in her second-grade class,Mrs. Flores directs most of her students to move to the learning centers that are set up around the room. The others form a small group at a table and receive direct instruction that either remediates skills from the lesson that they are struggling with or deepens their understanding through extension activities. At one of the centers, the students will play folder games that involve matching adjectives to nouns and then writing a sentence using the combination. At another center, the students read descriptive sentences and draw a picture using the details that they find. There are five learning centers in all. Which of the following statements is not a good justification for Mrs. Flores’s use of learning centers?