This year I decided to add the 0-120 number grids to my K-2 estimation jar. The number grids come from our Math Medley kits and kids can use dry eraser markers to “think” as they’re working out their estimation. Of course, there’s the thinking paper and the referents, as well.
I was cleaning up the Estimation Table at my last Family Math Night event when I noticed a slip of paper next to the Hershey’s jar. Taking a closer look at it, I realized I was looking at the thinking behind someone’s guess as to the number of Hersheys in the jar. This piece of paper is priceless to me as an educator. It allows me to clearly understand the steps this child took to arrive at his/her answer – an answer…
Above are the two estimation jars we used at a recent family math night event. Below are the estimation slips students filled out. Click on the image to print a copy.