In this math lesson, learners practice estimation and measurement skills as they move from station to station calculating length, volume, weight, and area. At each station, learners first estimate, measure, and then compute the difference between their estimation and the actual measurement. They estimate and measure marbles to the nearest gram and squeeze water-saturated sponges to practice measuring in millimeters. Learners practice linear measurement estimation skills by throwing cotton balls and rolling toy cars. Learners determine if they are a square or a rectangle by measuring and comparing arm span and height. Finally, each learner determines the area of his/her foot by counting and computing the area by constructing a rectangle to approximate the area.