This programed text is an introduction to the algebra of complex numbers for engineering students, particularly because of its relevance to important problems of applications in electrical engineering. It is designed for a person who is well experienced with the algebra of real numbers and calculus, but who has no experience with complex number…

The purpose was to ascertain whether there existed differential achievement effects associated with the factors and levels of context, form, item-stem and item-response format, size of common number, and school grade, as they relate to two variations of distributivity. Twelve 9-item tests were constructed and given to intact 4th-, 5th-, 6th-, and…

Several activities designed to allow students to play with and explore the special properties of the number nine are presented. A reproducible activity page is included. (MT)

Table games with special dice can help children with severe learning difficulties to improve their basic number skills (rote counting, numeral recognition, and counting out a quantity of objects from 1-200. Field testing supported the value of such games with 9- to 18-year-olds with moderate mental handicaps. (CL)

The study evaluated an errorless procedure for teaching nine educable mentally retarded students to solve missing minuend problems. Seven Ss acquired the target skill in a nearly errorless fashion in 75 to 172 minutes of individual training time. The other Ss required programatic alterations. (Author/CL)

Explores in three experiments development of three linguistic aspects of "more" in children's speech. Experiment 1 examined nature of early semantic content of "more;" Experiment 2, the child's differentiation of mass "more" from count "more"; and Experiment 3, the child's use of "more" as a…

Discoveries of Charles Babbage in the 1800s are described. Origins of the difference engine, his calculating machine, the principles of computation applied to tables, and the design and construction of his engine are included. (MNS)

Using license plates and telephone numbers for teaching probability ideas involving counting rules is suggested. How each is useful is illustrated in some detail. (MNS)

A method is described for finding the two numbers which will form a linear combination with two given numbers a and b yielding the greatest common divisor of a and b. (DT)

This project, an example of teacher action research awarded an SCRE Practitioner Award in 2002, considers a program for nursery staff development based around the number and mathematical strands contained in the Knowledge and Understanding section of "A Curriculum Framework for Children 3 to 5". This work was part of the Nursery's Development…

This paper suggests that many adult learners lack the skill of reading and writing larger numbers. Two Ovid computer searches of the ERIC (Educational Resources and Information Center) database are used to provide the background research. Issues in and teaching methods of reading and writing larger numbers, particularly a language-symbol approach,…