A square lattice is used to generate classroom activities, such as counting the number of squares in a lattice of a given size. (MP)

With the advent of computers and electronic calculators, the role of logarithms in the curriculum is changing. An intuitive approach to logarithms, stressing the notion of isomorphism, is discussed. (SD)

Using the overhead projector, or overlays on an original pattern, a variety of tessellations can be generated. Several illustrations are included. (SD)

Use of graphs in studying greatest common divisors, least common multiples, and other concepts can illustrate patterns related to the definitions of these concepts. (SD)

Upper-level secondary students investigated square and triangular numbers and Pythagorean triples using computers. (SD)

Students examined patterns emerging when numbers placed at vertices in a braided pattern were summed. (SD)