- A child is shown 13 objects spread out for 1 second. When asked, "How many?", the child responds, "Thirty!"
Help your student become a(n) Spatial Extent Estimator—Small/Big
Activities ask children to make simple perceptual estimations about which set has more, including comparison of some larger numbers, but only when comparing sets (e.g., 8) covering a small area to a much larger set (e.g., 16 or more) covering a larger area. Initially these differences can be quite obvious, then decrease them as children gain competence.
The Estimating Jar [Small/Big]