The document discusses using foldables to increase student achievement and assess student understanding. It defines what a foldable is and explains that foldables can be used to organize information, arrange data, sequence events, compare and contrast ideas, and for guided reading activities. The document then discusses measuring student understanding using six facets: explanation, interpretation, application, perspective, empathy, and self-knowledge. Various performance verbs are provided based on the six facets. The remainder of the document provides an example of using foldables to assess student understanding by having students create a children's book about the compromises made during the Constitutional Convention.