Common Core requires more reading of informational text. This reading strategy is an effective way to provide students several exposures to the reading which will aid in comprehension. Here is the rationale for this strategy.
This is a worthwhile activity to help summarize informational text. It would be motivating because students enjoy working with peers and getting to have conversations. It would also provide several exposures to the text. They would be asked to first read it, and then asked to summarize their section, which would revisit the text. Then students are asked to summarize their section on their note card, which is another revisit. After the lesson they are exposed to the text again through the class discussion and the writing of the summary by the teacher on the class chart. Instead of the teacher assigning the reading and the questions at the end, the students are actively involved in the reading, asked to take notes and summarize what they read.