Reported are the findings of a study of over seven hundred fourth-, sixth-, and eighth-grade pupils' ability to understand division involving zero. Implications for the classroom are discussed, including suggested teaching strategies. (JP)

Study supported by grant number 00870-05 from the National Institute of Child Health and Human Development.

A COMPARISON OF NUMBER SYSTEMS IS MADE IN THE FIRST SECTION OF THE CLASSWORK MATERIALS. A CHART COMPARING PREHISTORIC, BABYLONIAN, AND EGYPTIAN NUMBER SYSTEMS IS PRESENTED, AS WELL AS A WORK SHEET FOR EGYPTIAN HIEROGLYPHICS AND A TEST ON NUMBER SYSTEMS. ALSO INCLUDED ARE TESTS ON GRAPHIC FRACTIONS, COMMON DENOMINATORS, THE MULTIPLICATION OF…

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)