Poke the Content Area of Interest
At any one time, the Viewer only works with one version of the standards of a single content area. To change the standards document of interest, later, poke the app title (in the upper left corner).
The content of this Viewer is converted from original documents supplied by the Department of Education. Those documents are textual in nature, not necessarily designed for consumption in a structured database (as used by the Viewer). The conversion is believed to be correct but cannot be guaranteed. The source documents are the gold standard and may be referenced in each version's Note section.