The secondary technical schools of the United States, because of their heterogeneity, present peculiar difficulties to an investigation along the lines laid down by the International Commission. While such schools have existed for many years, it is particularly within the last decade that a great increase in their numbers has taken place, for it…

Discussed is development of a manipulative system which used dots on numerials for teaching basic mathematical concepts to mentally or variously handicapped children in kindergarten through grade 2. (MC)

Topics discussed in this column include patterns of inverse multipliers in modular arithmetic; diagrams for product sets, set intersection, and set union; function notation; patterns in the number of partitions of positive integers; and tessellations. (DT)

The relation of CA, MA, and IQ to conservation was examined by comparing the performance of bright, normal, and retarded children matched on the critical MA of six years. (Author)

Describes three classroom games for elementary school mathematics. Two are geoboard activities using a coordinate system; the third combines a knowledge of number facts with a game of tag. (RS)

Use of sign language for numerals is used to teach basic facts. Counting is first described, followed by sections on addition and subtraction facts and on reinforcing activities. (MNS)

Results from testing long division with students from age 11 to Continuing Education were traced. A much higher percentage of wrong answers was given when there was an embedded zero in the answer. (MNS)

Discusses the role of computer assisted instruction in helping children develop such basic skills as handwriting, reading, and understanding elementary numerical and spatial concepts. Indicates that techniques based on computer assisted instruction will aid children in academic and social development. (Author/JN)

Enrichment activities that teach about geometry as they instruct in geometry are given for some significant topics. The facets of geometry included are tessellations, round robin tournaments, geometric theorems on triangles, and connections between geometry and complex numbers. (MNS)

Some activities involving distances and diameters in the solar system are discussed. (MP)

Six versions of the card game "Concentration" are described using cards from a teacher-made deck. (MP)

An experiment is described which started with exploratory interviews, evolved to design and administration of diagnostic tests, and led to the preparation and use of calculator-enriched teaching materials. (MP)

Outlines six activities for grades six through nine designed to illustrate the processes used by archaeologists. These processes include observation, comparison, classification, communication, use of numbers, and hypothesis formation. (AM)

Two teaching ideas that focus on baseball are presented with a poster provided for each. The first activity features baseball applications of addition, subtraction, and number concepts. The second uses a baseball setting with logic-oriented problems. (MP)