Here you will be shown a solid blue curve and three other curves. Your goal is to choose which one of the other curves is the derivative of the blue curve. Remember when the curve is going up the derivative is positive and when the curve is going down the derivative is negative. You select the derivative curve with the corresponding color coded button at the bottom.[br]The timer starts when you make your first selection. If you select the wrong curve, the correct curve will be highlighted. Selecting the correct curve will allow you to continue. Your goal is to select 20 correct derivative curves in ten minutes.[br]When you have 20 correct answers or you run out of time a popup window will summarize your results.