One of 10 in a series on videotex, this promotional brochure discusses the enhancement of cable service systems that use videotex and teletext technologies. It explains the advantages of Canada's approach to videotex, which uses the standard called NAPLPS (North American Presentation Level Protocol Syntax), otherwise known in Canada as Telidon.…

Describes 10 computer programs used to draw diagrams usually drawn on chalkboards, such as addition of three vectors, vector components, range of a projectile, lissajous figures, beats, isotherms, Snell's law, waves passing through a lens, magnetic field due to Helmholtz coils, and three curves. Several programming tips are included. (JN)

This ERIC Digest discusses concept mapping, a technique for representing the structure of information visually. Concept mapping can be used to brainstorm, design complex structures, communicate complex ideas, aid learning by explicitly integrating new and old knowledge, and assess understanding or diagnose misunderstanding. Visual representation…

Describes a method to obtain three-dimensional (3-D) representations of data on a computer using commercial data-plotting or spreadsheet analysis software in any personal computer. (JRH)