Data citation: Cotton, J.M., Sheldon, N.D. (2019). Dataset from "Using Stable Carbon and Nitrogen Isotopes of Hair to Teach About Sustainable Agriculture Through Active Learning" [Data set]. University of Michigan Deep Blue Data Repository. https://doi.org/10.7302/wd4s-bq20 Files: There is an Excel spreadsheet with tabs containing all the data, as well as 5 individual CSV files of the tables from each individual tab. Cotton-Sheldon_2013_datasets.xlsx - Excel spreadsheet of data with tabs and tables of carbon and nitrogen isotopic composition. Cotton-Sheldon_2013_AllData.csv - Tables of carbon and nitrogen isotopic composition from the 2011 EARTH 284, 2011 EEB 410, and 2012 EARTH 284 courses. Cotton-Sheldon_2013_DietType.csv - Tables of carbon and nitrogen isotopic composition of omnivores, vegetarians, and vegan students. Cotton-Sheldon_2013_MeatConsumption.csv - Tables of carbon and nitrogen isotopic composition for those who eat meet more than once a day; those who eat meat once a day; those who eat meat less than once a day; and those who never eat meat. Cotton-Sheldon_2013_Gender.csv - Tables of carbon and nitrogen isotopic composition for male and female students. Cotton-Sheldon_2013_BritishComparison.csv - Tables of carbon and nitrogen isotopic composition for Michigan students and the British study.