Capture the energy of the wind and convert it to electricity! Wind farms are a rapidly-growing industry, providing electricity for over 11 million homes and creating tens of thousands of jobs in recent years. In this activity, students investigate how the blade design of a wind turbine affects the amount of power it generates. In the first part of this activity, students learn how to build a rotor and blade assembly from the materials provided. Each group’s prototype is tested by attaching it to a DC motor (acting in reverse as a generator) connected to a multimeter. A fan provides the wind. The highest reading of volts and amps are recorded and the maximum power output is calculated. After making observations and analyzing data from the preliminary tests, students brainstorm and decide how to make adjustments to enhance their design. The improved turbines are given a final test for electrical output. As students learn about wind power, they connect physics concepts to real-world problems! Complete for 30 students working in pairs and two testing stations. Multimeters and support stands with clamps are required for each testing station and are available separately. Box-type floor fans or turbo fans are also required for each testing station.