The Growth vs. Achievement "Birdshot" Chart
 Tennessee schools are measured on two things: achievement, seen in TCAP and ACT results; and growth, seen in TVAAS (i.e., value-added) results. For the first time, parents and interested others can compare the performance of their child's school and others across the district or state through ECF's interactive Growth vs. Achievement Charts.
Links to current charts, and those of previous years, can be found below. Note that the 2011 charts for elementary and middle grades rely on a new "Growth Index" calculated from value-added (TVAAS) scores. This index is also called the Literacy and Numeracy Evaluation Composite, and is said to be a more accurate indicator of growth than TVAAS NCE scores, as it factors in school size, a variable that can otherwise exaggerate the effectiveness of small schools.
Note also that the Tennessee Department of Education now grades schools on a scale of 1-5, with 5 being the highest grade. ECF is presenting these as letter grades which many find easier to understand; these charts therefore present a level 5 as an A, level 4 as a B, and so on.
To view the current charts, which present three-year average scores from 2009-2011, visit the following links:
To view last year's charts, which present three-year average scores from 2008-2010, visit the following links:
To view charts from two years ago , which present three-year average scores from 2007-2009, visit the following links:
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