Multiplication with a Curve (the parabola y = x^2)
For more information, read Wrigley, Andrew. How to teach an old curve new tricks [online]. Vinculum, Vol. 52, No. 2, Apr 2015: 10-11.
Availability: http://search.informit.com.au/documentSummary;dn=077983115131298;res=IELAPA ISSN: 0157-759X.
If you like this, you'll love this... Multiplication on the Reals with a Circle! https://tube.geogebra.org/student/m702787
NOTE: The y axis has been re-scaled 1 : 10 to show the products up to 10 x 10. The same principle works with a standard y = x^2 parabola drawn with 1 : 1 axes as can be seen at http://tube.geogebra.org/m/1352717