This article offers teaching strategies for developing number sense for children who are blind and braille users. Suggestions focus on developing number meanings, exploring number relationships with manipulatives, understanding the relative magnitude of numbers, developing intuitions about the relative effect of operating on numbers, and…

Reviews research on the use of sociodramatic play in developing preschool literacy skills, outlines the development of play centers which can be used to facilitate literacy development, and offers practical suggestions for acquiring the materials needed for the construction of such centers in preschool classrooms and facilities. (MDM)

Shows various methods of folding and cutting 4-, 5-, 6-, 7-, 9-, and 11-pointed stars. Discusses the geometry underlying each method. (MKR/SW)

Author describes five self-developed activities that utilize readily available materials to help students understand surface tension in liquids. The hands-on activities allow students to see that strong bonds hold molecules together in a liquid and the molecules seem to stretch producing a "skin" at the surface of liquids. (PR)

Presents a lesson that introduces students to polarized light using a problem-solving approach. After illustrating the concept using a slinky and poster board with a vertical slot, students solve the problem of creating a polarized light show using Polya's problem-solving methods. (MDH)

Describes a set of manipulatives that are used to establish a secure understanding of the concepts related to the environmental factors that affect the activities of enzymes. Includes a description of the model components and procedures for construction of the model. (DDR)

Describes a mathematics activity using square pads of notepaper and sticky notes to do simple paper folding in order to increase students' understanding of fractions. (ASK)

Discusses the importance of using children's previous experiences with geometric figures to build foundations for developing geometric thinking. Describes how children's play with unit blocks can be structured to give them experiences with geometric concepts. Contains 12 references. (ASK)

Discussion of the use of manipulative materials in kindergartens focuses on a new generation of computationally enhanced manipulative materials, called digital manipulatives, designed to allow all students to explore mathematical and scientific concepts through direct manipulation of physical objects rather than more abstract methods of learning.…

Describes a study which took place in a grade 9 classroom that consisted of five groups with 3-5 pupils in a group. Pupils were required to calculate the areas of a number of shapes on a geoboard. Concludes that a teacher working with pupils in small groups brings new challenges for mathematics teachers. (Contains 11 references.) (ASK)

States that puzzles are an important tool in helping children engage in the problem-solving process. Claims that children are interested in puzzles because they can be active as observers, problem solvers, and learners, with little or no assistance from adults and others. Defines nine characteristics of good puzzle-making situations. (MOK)

This article examines research to explore whether the use of manipulatives is an effective tool in teaching mathematics concepts and reasoning to middle-grades students.

The purpose of the present study was to present examples of the utilization of social processes such as teacher questioning and collective argumentation coupled with an appropriate use of a manipulative material to stimulate students' thinking in teaching geometry. We first present theoretical issues concerning the use of manipulatives, teacher…

This article describes the results of a year-long exploration of first graders' tool use. It also showcases instructional activities designed to link tool use with quantitative understanding. (Contains 3 figures.)

Balls made of modelling clay (Plasticine[TM]) can be used to generate a classroom discussion about the scientific evidence used to determine the structure of the Earth. This allows pupils to appreciate how evidence is used to support hypotheses and to distinguish fact from hypothesis. It also provides opportunity to correct misconceptions held by…