Problems involved with demonstrating mark-recapture techniques in ecology classes are discussed. An exercise which overcomes most of these difficulties using a known, restricted population of people is described. Jolly-Seber estimates of the size of this population varied in precision and accuracy with method and intensity of sampling, more or less as predicted. The assumptions inherent in the use of this model were met fairly closely. As the Jolly-Seber analysis indicated little dilution of or loss from the population, a more restricted estimating procedure (Schnabel) was also attempted, yielding slight gain in accuracy and precision. Suggestions for further improvements and refinements of this exercise are made.