n. As such, this set of Essential Elements addresses a small number of science
standards, representing a breadth, but not depth, of coverage across the entire standards framework. The
purpose of the DLM Essential Elements is to build a bridge from the content in the general education
science framework to academic expectations for students with the most significant cognitive disabilities.
This version of the Essential Elements will provide content for science assessments for at least the next
two years. The DLM Science Consortium intends to develop a learning map based on research about
how students learn science content and engage in scientific and engineering practices in the next phase
of the project. Revisions will be made when the science map is complete, at which time we anticipate the
EEs will be aligned to the map with revisions and additions as appropriate.
"That changed when NASA created the Landsat program, a series of satellites that would perpetually orbit our planet, looking not out but down. Surveillance spacecraft had done that before, of course, but they paid attention only to military or tactical sites. Landsat was a notable exception, built not for spycraft but for public monitoring of how the human species was altering the surface of the planet."