Elapsed Time
Understanding the concept of elapsed time and using that concept to calculate start time, end time or the elapsed time when the other two are given in military or civilian times.
Mapped to CCSS Section# 4.MD.A.2
Use the four operations to solve word problems involving distances, intervals of time, liquid volumes, masses of objects, and money, including problems involving simple fractions or decimals, and problems that require expressing measurements given in a larger unit in terms of a smaller unit. Represent measurement quantities using diagrams such as number line diagrams that feature a measurement scale.