Curated OER
Red Necked Grebe, Nonbreeding (Basic) Plumage, Ny, November.
The Red-necked Grebe eats its own feathers. Find out if scientists know why plus delve into other facts on this informative site. In addition, you can hear the songs of this grebe on this site.
National Council of Teachers of Mathematics
The Math Forum: Vectors
This site from the Math Forum of Drexel University contains downloadable sketches and pictures related to vectors. You may need to down-load the Geometer's Sketchpad to view these pages.
Curated OER
Number Nut: Gauss Number Pyramid
Illustration of a number pyramid created by a mathematician named Gauss.
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