This resource pertains to a novel active-learning technique called "relay." The relay activity takes ~15 minutes, and is low-cost and easily implemented. It can be used as a stand-alone activity or as an adjunct to traditional lectures. The PDF includes a description of the relay method, with an example and instructions on carrying out the activity. This resource may also be used to introduce the activity to learners. The data described in the resource has been submitted to PRiMER.