This is a collection of assignments around the problem of rodent infestation in cities, which has become a pressing problem following the mild winters in 2015-16. The assignments are designed to 1) develop mapping and data analysis skills, 2) give meaningful ideas for application prototyping, and 3) foster thinking about community engagement. This is based on an up-to-date (2017) dataset of rat sightings in New York City and an on-going collaboration between Georgia Tech and the community of English Avenue.