Delta-K,  Teaching Ideas,  Volume 31, Issue 1

Unit IV: Ratios and Rates

Journal of the Mathematics Council of the Alberta Teachers’ Association

Volume 31 Issue 1, December 1992

19 – 27

Unit III: Fractions

Collected and revised by Sol E. Sigurdson & Edited by Alton T Olson

16 Activities

Activity 1: Rectangular dimensions are excellent models for thinking of factors. Of course, a prime number has only one possible and somewhat uninteresting rectangle associated with it.