Test series by NRS levels and Scale Score Ranges
These charts provide a visual representation of the test forms in the five series and how they relate to student skill levels in terms of the CASAS and NRS scales. In this way, they show the comparative difficulty levels of the tests and how they overlap in providing an array of test instruments for assessing learning progress. The charts include appraisals and pre- and post-tests in reading, math, and listening.
Many people find this chart to be a great "birds-eye-view" to quickly understand CASAS form numbers and how they relate to the CASAS levels and scale.