Clever Tip for Teaching Capacity Conversions

I wish I could take credit for this idea, but I photographed this clever capacity tool from a classroom teacher.  I told her to save some items to hang on the wall for visual learners to reference pints, cups, quarts, and gallons.  I mentioned having one of her students save a milk carton from lunch to represent a cup, however she went a step further.  She made a cup, pint, quart, and gallon all from milk cartons.  Students are able to see how many milk cartons or cups are in each type of measurement.