The rules, equipment, and procedures for a game to teach clock reading are described. (DT)

Directions are given for activities that introduce students to determining the total surface area of rectangular prisms. A worksheet with 18 problems, plus a puzzle problem, is included. (DT)

Worksheets on constructing the circumcenter, the centroid, the orthocenter, the incenter, and the Nine-Point Circle in a triangle are provided for duplication. (DT)

The author criticizes an experiment of Moody, Abell and Bausell (EJ 038 323) on the grounds of inappropriate instruction and invalid tests. (MM)

SCIS materials are modified for use with acoustically handicapped pupils. (CP)

Achievement of 20 Trainable Mentally Retarded and 67 Educable Mentally Retarded Students under manipulative and non-manipulative modes of mathematics instruction are compared. (MM)

Lessons are suggested which involve dice in the instruction of various number concepts. Activities are presented under: (1) Early Number Concepts; (2) Meaningful Addition and Subtraction; (3) Place Value Practice; and (4) Extensions for the Intermediate Grades. The primary advantage of dice is their adaptability to student ability levels and…

In anticipation of the celebration of Metric Week 1980, a collection of metric activities from a mathematics lab is presented in this article. The activities were selected as being most suitable to grades 2-6 and easily adaptable to classroom mathematics. (Author/MK)

Questionnaires were administered to 22 elementary teachers to determine: (1) what kind of manipulative materials they had in their classrooms; (2) frequency of use; (3) way they were used; and (4) who used them. Findings indicate manipulative materials, when available, were infrequently used or were used for deductive, skills/fact-oriented…

Described are activities using paper plates with dots drawn on them which place a heavy emphasis on matching and ordering sets, on developing mental images of sets, and on perceiving sets of a certain size as composed of smaller subsets. Also suggested are activities involving numerals. (Author/TG)

Spatial concepts are important to the development of many skills, including reasoning and problem solving. Here are guidelines for making geometry learning more effective for elementary-grade students. (Editor)

Influential factors on the elementary students' proficiency in the fundamental skill of catching include: ball size, ball and background color, ball velocity, adjustive movements, and trajectory angle. (CJ)

The use of folding paper strips as a mathematical model in the instruction of operations with fractions is presented. (MP)

Included is information regarding: sucrose dehydration by sulphuric acid; an example of school-industry link in studying zinc oxide production; viscous flow in inorganic silicate glass; construction of a peristaltic pump; electrolysis; carbon dioxide preparation; electrophoresis; safety in using hydrogen and sulphuric acid; and approaches to…