"That was when we hit upon the idea of a
vortal. Put simply, it is a virtual doorway through which a visitor passes knowing that all linked sites will have a common interest."
Vortals are a "vertical portal" that focus on a specific topic.
Meanwhile, the grandly named Network of the World is tinkering with its "
vortals," or vertical portals and hiring expensive new marketing staff in anticipation of an official U.S.
Leatham); (25) "Goals for CAS-Active Senior Mathematics Curriculum" (Kaye Stacey, Gary Asp, and Barry McCrae); (26) "Calculator Technology Can Offer Sensible Choice in Computation" (Paul Swan and Len Sparrow); (27) "Teaching Primary Mathematics in Hong Kong: From Tradition to
Vortals" (Wong Tak-wah and Lai Yiu-chi); (28) "Choosing Models to Fit the Data and the Situation" (David Tynan and John Dowsey); and (29) "Mechanical Linkages, Dynamic Geometry Software and Mathematical Proof" (Jill Vincent and Barry McCrae).