The accuracy of estimating test means for groups of twelfth-grade students by the item-sampling technique was examined. The subjects were from 35 twelfth-grade schools participating in the National Longitudinal Study of Mathematical Abilities. Half of the students in each school were assigned to a treatment condition where they took a complete…

The purposes of the assessment project were to determine when the fourth grade math skills were acquired by the majority of students in the Salem, Oregon public schools, and to compare accomplishment on the criterion-referenced test with accomplishment on a standardized test. Because the project required testing grades 3-6, multiple matrix…