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…

Included is information regarding: fabrication of light emitting diodes, their operation as semiconductors, and an experiment demonstrating electroluminescence; experimenting with Random Access Memory (RAM) circuits; demonstrating Coriolis effect; measuring the diameter of an electron beam, E.H.T. meters; launching a trolley by catapult; a "random…

Masters of worksheets which provide experience with nonstandard constructions are provided. (MK)

Ways are presented to help students develop precomputational fraction concepts and skills using a circular-region or "pie" model. (MK)

Examines the influence of gender, reading level of student, and source of data on science concept formation and retention. Results indicate that reading level of students does influence science concept formation and retention, but gender and source of data (method of instruction) do not. (MA)

These worksheets involve the use of tangram pieces in creating geometric shapes and in analyzing properties of convex quadrilaterals. (DT)

Diverse activities using large blocks are described. By building and comparing configurations children can be led from concepts like long and high to concept of ratio. Games and activities to help build other concepts are also described. (SD)