Aurora Gallardo, The Extension of the Natural-Number Domain to the Integers in the Transition from Arithmetic to Algebra, Educational Studies in Mathematics, Vol. 49, No. 2 (2002), pp. 171-192 ...

An animated journey into the world of rational numbers! A fraction thief disrupts a number town, leading to a fun exploration of fractions, natural numbers, and mathematical concepts.

This article was originally published with the title “A Natural Log: Our Innate Sense of Numbers is Logarithmic, Not Linear” in SA Mind Vol. 19 No. 4 (August 2008), p. 13 ...