Matt Kuehl’s high school biology students investigated the frequency of common biological pathogens. Then they investigated the death rates of several diseases and plotted them on a mega map. Students identified correlations between the frequencies of the diseases and the locations of high death rates. Matt Kuehl is a 10th-grade science teacher at Grand Rapids High School in Grand Rapids, Minnesota. Photo by Shelly Lindstrom What inspired you to take the topic of infectious diseases, which you teach every year,…