This paper reviews a number of past studies in the field of diffusion research, describing the major features of each diffusion model and discussing its value for predicting the spread of educational innovations. Following this review, the author presents a new autocatalytic diffusion model based on the mathematical models of epidemiologists and…

This text is one of the sequence of textbooks produced for low achievers in the seventh and eighth grades by the School Mathematics Study Group (SMSG). There are eight texts in the sequence, of which this is the last. This set of volumes differs from the regular editions of SMSG junior high school texts in that very little reading is required.…

This booklet contains the graphs of mean cumulative and achievement scores, as well as a grade level analysis, for all grade schools in Charles County, Maryland during the 1973-1974 academic year. (Author/BJG)

A public television station in New York, WNET, conducted a survey of its potential audience. The purposes of the study were to determine: (1) the demographic characteristics of the station's members, non-member viewers, and non-viewers; (2) the image that the station conveys to the public; (3) the perceived importance of premiums as an inducement…

The purpose of the study was to determine in what sequence skills in graph interpretation should be presented in grades K-9. A sequential list of mathematics skills for grades K-9 was constructed, graph skills were identified and arranged in a sequential and spiral manner, then graph skills were matched with appropriate mathematics skills and…

This self-instructional, job-oriented booklet on descriptive statistics for the health professions deals specifically with measures of central tendency (mean, median and mode). It is limited to those concepts and techniques most needed by health professionals working routinely with basic statistical data. (CK)

This report summarizes abortion information received by the Center for Disease Control from collaborators in state health departments, hospitals, and other pertinent sources. While it is intended primarily for use by the above sources, it may also interest those responsible for family planning evaluation and hospital abortion planning. Information…

This booklet contains five activities designed to assist secondary school science students master the skills of scale reading, taking an arithmetic mean, locating points on a graph, drawing graphs to represent relationships, and recognizing experimental error in a graph of a simple relationship. The unit is a trial version of a techniques unit…

This booklet summarizes the recent debate over the regressivity or progressivity of the property tax and presents some evidence on how the property tax burden is distributed among income classes. Section 1 discusses property tax incidence under both the conventional and new economic views. Discussed specifically are the conditions under which…

This booklet is designed to provide school board members, school district voters, and other interested individuals with a basic understanding of New York's system for the distribution of state aid to school districts. Although the booklet provides a fairly complete outline of New York's school finance plan, it is not a detailed technical guide to…

Presents a graph showing the female labor force from 1890 to 1970 and asks students leading questions which encourage them to draw implications for the future. (DB)

Lines in the coordinatized plane which do not go through the origin can be designated by the ordered pair of intercepts. The enrichment unit described illustrates duality in mathematics. (SD)

The author, an economist, discusses nine forms of international cooperation according to their strengths, and invites representatives of other disciplines to comment on international cooperation. Discusses relevant concepts and the estimation of optimal procedures for cooperation. Available from: Unipub, Box 433, Murray Hill Station, New York, New…

Energy eigenstates are superimposed in order to form a wave packet for an electron propagating in one dimension under the influence of a uniform, time-dependent electric field. A graphical method is presented by which one can obtain both the position and shape of the envelope. (BB)

The representation of equivalent fractions is traditionally illustrated by diagrams showing division of units into parts. A second approach using linear graphs is suggested. (SD)