The Finch can be used to measure proportional relationships. Students can find the relationship between wait time and the angle turned by the Finch, as shown in How Far Will the Finch Turn?. They can also analyze the relationship between wait time and the distance the Finch moves. In addition, proportions can be used to relate input from Finch sensors to actions of the motors or changes on the computer screen. Examples are shown in Finch Pong I and Graphing with Finch.