Many rules taught in mathematics classrooms "expire" when students develop knowledge that is more sophisticated, such as using new number systems. For example, in elementary grades, students are sometimes taught that "addition makes bigger" or "subtraction makes smaller" when learning to compute with whole numbers,…

This study is an exploration of teachers' engagement with concepts embedded in the normal distribution. The participants were a group of 290 in-service teachers enrolled in a teacher development program. The research instrument was an assessment task that can be described as an "unknown percentage" problem, which required the application…

Teaching methods which can be used to teach statistics at the primary, intermediate, and middle grades are described. Teaching data analysis and problem solving in this context are discussed. (CW)

Suggested are some instructional strategies for dealing with the challenge of teaching students with limited English language proficiency. An example of a classroom activity designed to implement these suggestions is presented. (CW)

Provides a rationale and overview of the content of the working draft of the Curriculum and Evaluation Standards for School Mathematics, developed by the National Council of Teachers of Matematics. (PK)

A discussion of mathematics curriculum and teaching methods based on the standards issued by the National Council of Teachers of Mathematics (NCTM) and National Council of Supervisors of Mathematics (NCSM) is presented. The standards emphasize the connectedness of each of the branches of mathematics and underline the relationship of each branch to…