This video offers an exciting four-part adventure about two teenage sleuths who discover the presence of an alien below New York City. As they try to make contact with the alien, they are confronted with a series of mathematical challenges that test their knowledge of the content strands recommended by the National Council of Teachers of…

This print guide to the "XY Encounter" video offers an exciting four-part adventure about two teenage sleuths who discover the presence of an alien below New York City, and expands upon themes presented in the video. As the students try to make contact with the alien, they are confronted with a series of mathematical challenges that test their…

A proposal for teaching how to graph functions is presented on the basis of the teaching theory of didactical situations implemented by the French author Guy Brousseau. The proposal is aimed at students in 12th grade in high school (USA) or in a freshman calculus course. The TI-92 graphic calculator was used as a teaching aid. (Author/ASK)

Five basic theories of instructor behavior and attitudes were briefly discussed and evaluated. Each of these theories was evaluated for their significance with regard to instructional performance and institutional achievement. (Author/RK)

Research supported by contracts from the U.S. Office of Education and the Advanced Projects Research Agency. (DD)

Paper prepared under contract with the Defense Language Institute, English Language Branch, Lackland Air Force Base, Texas, and presented to the staff and faculty of the Institute in 1972. (RS)

Student perceptions of the distributution of power in colleges and universities may be a factor in campus unrest. This study is an exploratory attempt to measure these perceptions on two different campuses and to compare present perception with what is seen as ideal. (Author)

Presents to subjects graphs representing differential variabilities over time in an attitude, a behavior, and a physical state and asks them to estimate the possibility of influencing each trend. Highly variable attitudes were seen as susceptible to change, whereas the others were not. (RW)

Several brief articles are included in this section. "Purple Puzzlers" are challenging problems for algebra students. "Linear Invaders" is a game to reinforce concepts of graphing lines. "The Diagonal Method" is used to prove that the real and natural numbers cannot be put into one-to-one correspondence. (MNS)

The focus is on graphing activities, in which students locate points on a coordinate system and name points by an ordered pair of numbers. Worksheet masters designed for duplication for classroom use are included. Practice is provided with coordinate grids, and student exploration is promoted within the materials. (MP)

The activities presented here focus on symmetry. The materials aim to provide experience in: (1) observing grid-drawn pictures and coloring in appropriate squares; (2) making symmetric designs about two lines of symmetry; (3) using a ruler and protractor; and (4) using a ruler, protractor, and compass. Worksheet masters are provided. (MP)

It is noted that all graphs of cubic equations are symmetric about their inflection points. This is proven through the use of some calculus and the fundamental theorem of algebra. A table sums up the nature of symmetry for polynomials of any degree. (MP)