Dr. Cotter has an article published in the Hungarian journal Symmetry: Culture and Science, Volume 34, Number 3!
Her article is titled Symmetry for Children Using Drawing Board Tools and Tangrams. The abstract reads:
Young children are unable to use Euclid’s tools for geometric constructions. However, children as young as 5 years can construct equilateral triangles, hexagons, squares, and other geometric figures using scaled-down traditional drafting tools: T-square, 30-60 triangle, and 45 triangle. Older children can draw lines of symmetry and construct figures about a line of symmetry both vertically and horizontally using tangram pieces. Through this work, children will appreciate geometry and experience the beauty of mathematics.
To read more, click on the red Open Access button, download, and enjoy!