To view which students have incomplete DEA test results, do the following on your login:

>My DE Services
          >Manage Assessments  (INTERIM BENCHMARKS section)
               >View Status Report
                  Select a class and a test period to display the status report for your homeroom group

This gets you to a display like the results pictured above.  
Clicking on the blue Started will display an expandable menu listing who has started the benchmark but not completed all questions. 
Likewise, the red Not Started displays an expandable menu.