Images formed from light rays refracting a spherical surface are often introduced in textbooks using the paraxial approximation. Incoming rays propagating from the object meeting the surface of a transparent medium at a given point for which the angle is larger than 15 degrees with respect to the normal are not described accurately from the…

This paper describes students' interactions with dynamic diagrams in the context of an American geometry class. Students used the dragging tool and the measuring tool in Cabri Geometry to make mathematical conjectures. The analysis, using the cK[cent sign] model of conceptions, suggests that incorporating technology in mathematics classrooms…

Microsoft PowerPoint, Apple Keynote, and OpenOffice Impress are relatively common tools in the classroom and in the boardroom these days. What makes presentation software so popular? As the Chinese proverb declares, a picture is worth a thousand words. People like visual presentations. Presentation software can make even a dull subject come to…

The author has been blessed with an opportunity to contribute to the profession of health education via a technology that 20 years ago did not exist. The HEDIR catapulted him into the national limelight. He created the HEDIR in 1992--the profession's first email directory and listserv. The profession has found the HEDIR to be an exceptional tool…

Q: When the interface of an interactive, digital, scholarly article is designed as an integral part of the article's argument, what are the rhetorical, conceptual, and technical challenges of re-designing the project to better enact that argument? Susan Delagrange offers a behind-the-scenes look at the authorial and editorial processes that led to…

There are many arguments that reflect on inductive versus deductive methods in mathematics. Claims are often made that teaching from the general to the specific does make understanding better for learners or vice versa. I discuss an intervention conducted with Grade 10 (15-year-old) learners in a small suburb in South Africa. I reflect on the…

This article uses photographs as a springboard for mathematical inquiry to encourage readers to see patterns and relationships that they can think about and extend in a mathematically playful way. Herein, two photographs are presented along with a discussion of the meaning of slopes and their relationship to gradient and pitch. (Contains 6…

Increased demands for research and high-performance computing (HPC)--along with growing expectations for cost and environmental savings--are putting new strains on the campus data center. More and more, CIOs like the University of Notre Dame's (Indiana) Gordon Wishon are seeking creative ways to build more sustainable models for data center and…

As colleges and universities rely more heavily on software as a service (SaaS), they're putting more critical data in the cloud. What are the security issues, and how are cloud providers responding? "Campus Technology" ("CT") went to three higher ed SaaS vendors--Google, IBM, and TopSchool--and asked them to share their thoughts about the state of…

Liz Kolb started her education career as a teacher of middle and high school social studies in Wyoming City Schools in Cincinnati. She was also a teacher and technology coordinator at Grandview Heights City Schools in Columbus, where she adamantly opposed cell phones in school until she had an "ah-ha" moment. She then founded the Web site Cell…

Asking students to manipulate digital photos on the computer is one of the easiest ways the author knows to engage their attention. It's fabulous fun for them and a great teaching tool for educators. In this article, the author presents 10 ways to impress students with image-editing software. These are: (1) filters are fascinating; (2) get a move…

The value of video analysis in physics education is well established, and both commercial and free educational video analysis programs are readily available. The video format is familiar to students, contains a wealth of spatial and temporal data, and provides a bridge between direct observations and abstract representations of physical phenomena.…

This article is the second in a series of two papers which suggest some practical, spreadsheet-based ideas for helping students to make appropriate connections between particular algebraic concepts. Solving equations has traditionally been taught as a pen-and-paper process. Spreadsheets, such as that of Excel, provide a contemporary, and powerful…

Digital plagiarism is a problem for educators all over the world. There are many software tools on the market for uncovering digital plagiarism. Most of them can work only with text submissions. In this paper, we present a new architecture for a plagiarism detection tool that can work with many different kinds of digital submissions, from plain or…

In this article, the authors describe how they incorporated environmental awareness into their art curriculum. Here, they describe a digital photography project in which their students used flatbed scanners as cameras. Their students composed their objects directly on the scanner. The lesson enabled students to realize that artists have voices…