Teaching High School Mathematics; First Course; Subtracting Real Numbers
Max Beberman shows mathematics teachers how to help students produce a formal definition of subtraction. Rather than allow them to
watch someone solve a division problem and imitate the procedures, he teaches students to use real discovery. He then develops the concept of adding negative numbers. Black and white
picture with sound. Eastman Kodak edge code reads "square triangle," which correlates to 1965.
University of Illinois Committee on School Mathematics (producer)