In this unit students use a length model to partition units of one into smaller equal parts, to create unit fractions. Students form non-unit fractions (e.g. 3/4 and 7/8) and develop strategies to find different names for the same fraction (equivalent fractions). Fractions are added and compared to find difference and a fraction of a length is determined. Finally, a length model is used to find a fraction of a whole number amount.