Length - Area - Volume - Mass - Time by Rik Carter. Exploring Measurement provides a developmental approach to understanding the concepts of length, area, volume, mass and time. Featuring the use of arbitrary units like hand spans, desk widths, rice and water, each of the 50 activities provide the opportunity for students to a math to their own surroundings. From measuring with fingers to tessellating with colors, to estimating the time to write fifteen "ai" words, Exploring Measurement is full of fresh, meaningful activities. 56 pages.