This review is part of a large research endeavor to develop a mathematical model to predict spelling difficulty. It reviews attempts to answer the question: What makes a word difficult to spell? (Author)

Analyzes the allocation of student time from the perspective of economic theory with an economic model that predicts a small increase in educational achievement relative to substantial increases in instructional time. Predictions are supported by empirical evidence. Policy consequences are examined. (MLF)

The issues discussed in these four papers concern the validity and generalizability of classroom observation instruments. These issues have been studied and are reported here in an attempt to better define the limits to which classroom observation instruments can be used in researching relationships between teacher behavior and student outcome.…

Two methods of reading instruction (homogeneous grouping and graded classes) are compared for 165 students in 8 rural North Dakota schools by raw gain scores, residual gain scores, and the analysis of covariance. (CK)

Having low literacy skills could impact everything from reading a newspaper and balancing a checkbook to wise consumer decisions and job advancement. This study estimates adult literacy measures for Cuyahoga County, Ohio and its municipalities. It is also important to have a sense of how many children are at risk for developing literacy problems…