This paper discusses research on how concepts differ in their internal organization and how these differences interact with and affect cognitive processing in children. Two types of natural concepts are focused on: classes (nouns with class-inclusion organization, such as "trees,""students,""soldiers" and collections…

Selected from the National Instructional Materials Information System (NIMIS)--a computer based on-line interactive retrieval system on special education materials--the bibliography covers 62 materials for teaching number concepts to learning disabled students at the primary grades. Entries are presented in order of NIMIS accession number and…

The Money/Counting Kit for Handicapped Children and Youth, frees the teacher from lessons in money and counting concepts and enables a student to learn at his own rate with immediate feedback from activity cards, name cards, thermoformed coin cards (optional), and self-instructional booklets. The activity cards, which may be used individually or…

The teacher's texts for two teaching sequences in the LOGO mathematics course are presented in this second volume of a four-volume report. The material presented here is designed to be a broad overview of the application of LOGO to the topics of numbers and functions. A variety of alternative paths and approaches are presented; in each case the…

This booklet explains in detail how a number line can be used to demonstrate adding, subtracting, multiplying, and dividing fractions. The fractions 5/7 and 2/3 are first used as examples for each operation, then results are generalized to operations on a/b and c/d. (Related documents are SE 015 950 and SE 015 951.) (DT)

Two groups of 32 educable mentally retarded children (ages 7 to 14 years) were compared as to their arithmetic and classification performances attributable to the presence or absence of a 4 1/2 week exposure to classification tasks. The randomized block pretest-posttest design was used. The experimental group and the control group were matched on…

The effects of negative instances in the acquisition of the conjunctive concepts of distributivity and homomorphism were examined. Ninety-two elementary education majors were used as subjects. Two treatment levels for distributivity (series of positive instances or positive and negative instances) and the same treatment levels for homomorphism…

The first of three volumes of a mathematics training course for Navy personnel, this document covers a wide range of basic mathematics. The text begins with number systems, signed numbers, fractions, decimals, and percentages and continues into algebra with exponents, polynomials, and linear equations. Early chapters were designed to give insight…

Some computations when done on the hand calculator yield results which can be read as words or phrases. (SD)

A method for converting francs to dollars and dollars to francs is shown to involve the harmonic mean. (MP)

Presented is a historical treatment of computational devices that use counters on a checkerboard. The discussion includes works of John Napier, Walter Minto, and Nicholas Saunderson. (MP)

Directions are given for construction of tangram puzzles that can be used to reinforce arithmetic concepts. Several examples are given. (MP)

The use of the hundred chart is discussed as an effective means of teaching the concepts of least common multiple and greatest common factor. (MP)

Random number generation by computers is discussed. A BASIC program is given that uses random numbers to print a given name in random positions at given time intervals. (MP)

A series of carefully planned activities is described for introducing first-grade students to place value with two-digit numerals. (JT)