In this activity (page 105 of the PDF), learners measure heart rate and blood pressure and learn how to obtain consistent measurements during repeated tests. This activity teaches learners how to measure a pulse manually as well as how to use the sphygmomanometer and the stethoscope. Use this activity to discuss how astronauts in space measure their blood pressure and heart rate in space differently. The lesson guide, part of NASA's "The Brain in Space: A Teacher's Guide with Activities for Neuroscience," includes background information, evaluation strategies, and handouts. Note: cost of materials does not include cost of stethoscope or sphygmomanometer; these may be borrowed from a nurse.