In recognition of the fact that young children develop informal number concepts and strategies for solving several basic types of verbal addition and subtraction problems before entering school, but lose this ability after a few years of schooling, the study created and tested an intervention designed to build on the children's early insights. A…

This manual identifies a series of performance measurements which, when assessed in their totality, can effectively measure a public library's level of service to its users. The measures have been developed at two levels. On one level, the measures can broadly evaluate the overall performance of library systems on the national level; on a second,…

The first part of this paper discusses two principal forms elaborated upon in previous literature for describing the relation between per pupil operating costs and school enrollment size. The first of these forms indicates that average per pupil costs decline up to a point as enrollment increases, reach a minimum, and then rise with further school…