Activities and teaching methods for developing an understanding of fractions are presented. The activities, which use mathematical models (visual representations of fractions), are divided into three sections: (1) equivalent fraction circles; (2) fraction bars; and (3) multiplication of fractional numbers using squares. Each section includes the purpose (concept or concepts to be taught), materials needed (transparencies and handouts), directions for making the materials, photocopied transparency and handout masters, and teaching procedures for the activities. (DC)