We used this in our notebooks as a foldable to learn the Metric conversions. Just one way to organize the metric ladder system for converting. The boxes at the top of the table were labeled with the acronym KHDUDCM. Cut the flaps between each letter. On the top of the flaps we labeled all of the units that could be used for each (liter, meter, gram) Under the flaps we wrote how to move the decimal/multiply or divide to convert.