All of the following problems are written to be aligned with the TEKS for Area, Perimeter and Volume. These problems and sorting activity can be used from 3rd – 5th grades, increasing the expectations for how students solve the problem with each grade level. 3rd grade will do more sorting and explaining why the problems are perimeter, area, or volume to reinforce the concept knowledge. 4th grade can sort and begin to solve and 5th grade can sort, write the formula, and use the formula to solv