Mr. Montague is a new teacher who is preparing for the first two weeks of schools. He has reviewed the learning records of his upcoming students and recognizes that he has a widerange of ability levels assigned to him for his first year. In order to meet the needs of the diverse learners in his classroom, Mr. Montague plans to use a variety of different grouping practices during instruction and independent practice activities. One of his planned activities involves dividing the students up into small groups, assigning them a topic and having the students create an informative poster that each group will then share with the entire class. Which grouping format does Mr. Montague’s activity employ?