When the results of the Minnesota Department of Education's 2021 student academic assessment tests were released this fall, fewer students statewide had tested as proficient in reading, math and science than in 2019, the last year that the Minnesota Comprehensive Assessments were done and Detroit Lakes was not an exception. But the local school district's education director says the MCA data is not really a "useful" indicator of either student or teacher performance during a year of unprecedented educational challenges.