This activity (page 2 of the PDF under SciGirls Activity: Double Dutch) is a full inquiry investigation into whether hearing or seeing has a bigger effect on jump rope performance. Groups of learners will plan a Double Dutch jump routine and count the number of moves before the jumper trips. Then, learners test the routine while the jumper listens to slow music and again while listening to fast music. Learners collect data, produce a table comparing average performance per auditory stimulus, and consider the validity of their results. An optional extension activity asks learners to investigate how a strobe light affects jump rope performance. Relates to linked video, DragonflyTV: Double Dutch.