In Assessment Center, the Detailed Performance on Standards report gives a look at how students have done over a selected set of assessments. Aggregating the tests gives a larger sample of questions that cover the same skill, and therefore, increases the validity of the information. You could also select only early assessments in one report and in a second report select only recent assessments, and then in effect have a comparison from two different periods of time.
Also in Assessment Center, you will find the Assessment Comparison Report which will allow you to compare two or more assessments and give a look at growth over time.
Be sure you take a look at the set of reports that are available, and if you would like to have a project leader come to your building, be sure to contact your project leader to set up a visit.
