A grade 6 history teacher is beginning a unit on Native American history. After the teacher forms the students into groups, each group will identify a specific tribe on which to concentrate. The unit will integrate a variety of instructional approaches, including Internet research and a culminating presentation. The teacher wants to use this unit to help develop students' independence as learners and to engage in learning activities that promote high levels of understanding of the history content.
Which of the following delivery methods best describes the teacher's approach in teaching the Native American history and culture unit?