CASE Assessments Research Overview
Rigorous Process of Item DevelopmentQuestions undergo multiple content and grammar quality checks and are reviewed by teachers. The questions also are reviewed to ensure that they are fair, unbiased, and accessible. The questions mirror the format, blueprints, and difficulty level of the state end-of-grade and end-of-course assessments. There are specific directions for students and teachers in administering the tests. Click here to review the TE21 Item Development Process.
Reliability and ValidityTE21’s CASE Assessments provide information for teachers to guide instruction, to monitor student learning, and to predict how well students will perform on state tests. These benchmarks are essentially summative assessments (administered several times a year) that are used for formative purposes to help guide instruction.
ReliabilityThere are two or more equivalent forms of the tests that are administered during the year without evidence of practice efforts (improvements in scores that result from students taking the same version of a test multiple times). To increase reliability, the assessments use sufficient numbers of questions and allow adequate time for students to take the tests. The assessments typically have above 90% predictability and are valid predictors of how well students are likely to perform on state tests. TE21’s assessments also are reliable as the benchmark scores are consistent throughout a year’s measurement.
ValidityTo ensure validity of CASE Assessments, the tests measure what is expected to be covered in the curriculum during the time preceding the tests. The CASE benchmarks are aligned to a school district’s curriculum of what is taught and on what schedule.
ReportsTeachers are provided item analysis reports that show how well students perform on each question and the difficulty level measured by the P-value of the students who answered the question correctly. With this information, teachers have a better understanding if students at various levels answered questions as the CASE curriculum team and statisticians would have expected them to answer. Teachers receive the reports on their students within 48 hours after TE21 receives the data from the scanned answer documents so teachers have the data to use immediately to inform instruction. Teachers also keep the assessments so they can refer to the questions in their re-teaching.