After many iterations, the classroom activity “Measuring Soil Microbial Activity” that I have been working on for several months is now posted on the Great Lakes Bioenergy Research Center Website: https://www.glbrc.org/education/classroom-materials/measuring-soil-microbial-activity. Many thanks to Kevin Budsberg, Jonathan Schramm, Sara Krauskopf, Teri Balser, and Andy Anderson for their input.