Produces algebraic solutions by reducing the problems to equations and arithmetic solutions that do not use variables. Investigates how the arithmetic solution helps students better understand the problem before they approach it algebraically and how logic used in solving the problem arithmetically can be directly linked to the algebraic…

Illustrates how engagement in worthwhile mathematical tasks can provide rich opportunities for professional development. Presents different solution strategies for the effective tax rate problem. Emphasizes that, to help students recognize differences among the preceding arguments, teachers need to recognize reasoning based on part-whole…

Presents activities to cultivate the tendency to see special qualities in numbers that can be played on certain calendar days. Includes games on the constant of the day, Fibonacci and golden ratio dates, primes, powers, December 25, and the day of the year. (ASK)

Recognizing geometric shapes and noting their special properties are important steps in learning geometry. Offers the use of geoboards and emphasizes that much of what teachers want students to learn about squares, rectangles, and trapezoids can be accomplished with geoboard figures. Presents activities on quadrilaterals using geoboards. (ASK)

Summarizes and extends a well-known geometry theorem that states that any triangle inscribed in a circle with one side of the triangle a diameter of the circle, is a right triangle. (ASK)

Presents and discusses examples that can be used to develop the concept of slope as a rate of change through three modes of learning: (1) visualization, (2) verbalization, and (3) symbolization. (ASK)

One of the biggest hurdles in teaching statistics is convincing students that the area under curves has anything to do with all the samples, histograms, and various other indicators to which they have been exposed. Presents two examples to illustrate this phenomenon. (ASK)

Explains and demonstrates a procedure that is commonly used to determine the reliability of a test in such a way that a person who has modest arithmetical skills can carry out the same analysis on a classroom test or examination. (ASK)

Presents an activity that uses square-foot tiles as a coordinate system on which human geometric models are constructed. (ASK)

Discusses the benefits of learning the history of mathematics and how it can be useful in teaching as well as interesting. Provides information on how to put mathematics in its historical context, show the interaction of mathematics with cultures, and shed light on the teaching and learning of mathematics. (Contains 25 references.) (ASK)

Presents activities that allow students to explore alternative voting methods and discover the advantages and disadvantages of each method. Features the statement and proof of Arrow's theorem which requires only basic arithmetic and allows students to engage in high-level mathematical thinking. (ASK)

Active involvement and infusion of mathematics into familiar, everyday experiences are essential elements in challenging students to engage in true thinking. Presents an investigation on graphing that touches on all representations including tables of values, graphs, and verbal descriptions. (ASK)

Describes students' investigative work that resulted from playing the game Set in an attempt to show how such games can be used to develop mathematical reasoning. (ASK)

Several packages designed by Elizabeth Marquez for mathematics teachers of grades 6-12, officially entitled the Teacher Assistance Package in Support of Better Algebra Assessment, is a series of resources developed to accompany ET's End-of-Course Algebra Assessment. It is designed to enhance teachers classroom assessment by providing examples of…