Ms. Sweeney is a 2nd grade teacher at Walton Elementary School. She works in a professional learning community with three other 2nd grade teachers. The team is concerned because wide gaps exist in their students’ scores on the district benchmark in reading. The teachers wonder if the differences in scores could be accounted for by the level of parent participation in a school-sponsored “read with your child” program. The teachers decide to conduct an action research study to find out. How can the teachers triangulate their data collection and analysis process?