Discussed is research on children's understanding of zero and infinity and teaching suggestions for improving understanding. (RH)

Difficulties encountered by a dyscalculia child are discussed and remedial activities suggested. Disturbances discussed are verbal, visual-spatial, reading and writing numbers, operations, understanding concepts, and place value. (MP)

Thinking strategies that are related to counting are discussed and activities that are necessary for the understanding of number and counting are suggested. (Author/MP)

A set of square counters is described as a simple way to introduce new concepts and as a concrete way for students to learn. (MP)

This discussion of the mathematical potential of classroom events gives many examples of incidents that can be used for learning about topics such as one-to-one correspondence, counting, sets, ordering, time, fractions, money, shape, estimation, measuring, volume, area, number operations, and graphs. (MP)

Several problems are identified: place values, time, even numbers, fractional parts, and temperature. Specific teaching suggestions are discussed. (MP)

One student's project involved a contest of guessing how many peanuts were in a 100-pound bag. His teacher briefly reflects on the wide range of guesses and students' concept of large numbers. (MP)

Eight classroom problems dealing with number concepts are presented and accompanied by suggestions for teacher use. (MP)

It is argued that number sense develops through meaningful, purposeful activities involving calculating, measuring, and estimating. Understandings that must be developed with each are discussed. More emphasis needs to be placed on thinking about the various procedures that can be used to solve problems and on interpreting the answers. (MNS)

Suggestions for incorporating number sense into lesson warm-ups, lesson development, and practice exercises are provided. Ideas for developing a positive climate for thinking numerically are given. Then when, where, and how to develop number sense are discussed. (MNS)

Multi-shaped blocks can be used to help young children develop many mathematical concepts and abilities. Several suggestions for using these blocks to create problem situations through which children develop concepts are offered. (SD)

Establishing and maintaining the desirable kind of balance between meaning and computational competence is the subject of this reprint from a 1956 issue of the journal. Sources of the dilemma and suggestions for solution are discussed. (MNS)

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)