Unique calculator helps students solve challenging word problems involving elapsed time, distance and rate of travel. Calculator displays answers to distance and rate of travel problems in both U.S. customary and metric scales. Also indicates answers in both 12-hour and 24-hour notation. Features 3 modes: Elapsed Time, Distance and Standard Calculator. Large, 3-row display is easy to use, and arrow keys allow students to toggle back and forth as they input values. Activity Guide included. Made of durable plastic, calculator measures 3 3/4"L x 3/4"W x 7"H. Requires 1 button-cell battery, included.