Spirals on quilts

Baravelle's Spiral and Infinite Geometric Series (rev)

Lesson plan - Fibonacci Spirals

Elective div 2 GGB Fibonacci Spiral

A puzzling pentagon 2

The Impact of GeoGebra in Math Teachers’ Professional Development

http://archives.math.utk.edu/ICTCM/VOL23/S113/paper.pdf

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