GeoGebra is a free tool that has the potential to change both how and what is taught in mathematics. GeoGebra allows teachers and students to explore various mathematical ideas either through the full applet (https://www.geogebra.org/graphing) or by sharing applets via GeoGebra's Materials site (https://www.geogebra. org/materials/). It has many…

While looking for an inexpensive technology package to help students in statistics classes, the author found StatKey, a free Web-based app. Not only is StatKey useful for students' year-end projects, but it is also valuable for helping students learn fundamental content such as the central limit theorem. Using StatKey, students can engage in…

In October 2014, an interesting new app became freely available in the Apple Store®. It is called PhotoMath®: (1) Hold a phone or tablet up to a mathematics problem in a textbook; (2) The app shows the answer to the problem; and (3) Select Steps to see the step-by-step process for getting from the problem to the solution. The app works for simple…

Characteristics of computer arithmetic that may cause programing problems are considered. How numbers are stored in a computer, round-off error, overflow, and double-precision arithmetic are among the topics considered. (FL)

This article demonstrates an iterative method of evaluating the cosine function which can be derived using secondary school trigonometry. A sample computer run is included. (MM)

A computer program developed by a high school student approximates the value of "e" by computing partial sums of the defining series. (SD)

The history of computer use in education as a problem solving tool is briefly traced; suggestions are made for teacher training in the computer sciences. (DT)

Data on computer literacy from the 1977-78 National Assessment of Educational Progress (NAEP) are discussed. (MP) Aspect of National Assessment (NAEP) dealt with in this document: Results (Interpretation).

The curved intersections of conics with planes are described. Two computer programs are given to enable students to simulate the "explosion" of ellipses into parabolas and then into hyperbolas. (MNS)