Studies carried out over a 12-year period addressed fundamental questions on the use of Rasch-based item banks. Large field tests administered in grades 3-8 of reading, mathematics, and science items, as well as standardized test results were used to explore the possible effects of many factors on item calibrations. In general, the results…

The Charleston County School District (CCSD) has recently begun development of criterion-referenced tests (CRT) in different subject areas and for different grade levels. This paper outlines the process that CCSD followed in the development of math and language arts tests for grades one through eight and area exams for required high school…