Intended to provide a knowledge base for intervention and remediation, this report summarizes what is currently known about patterns of children's reading and spelling substitution errors, with an emphasis on specific examples of the kinds of mistakes actually made by students. Following an introduction, preface, and preparatory quotes, the report…

Outlined are the weaknesses of traditional, norm-referenced tests which fail to help in making instructional decisions. Presented is a step-by-step series of operations for analyzing and categorizing arithmetic errors, for selecting corrective strategies, and for applying peer-referenced standards to judge the performance of special needs…