ratio and proportions

Why study ratio and proportions? videos from the  BBC

Illustrative Mathematics

http://www.centercitypcs.org/wp-content/uploads/2015/08/7th-Grade-Unit-1-Applying-Proportional-Reasoning.pdf

file:///C:/Users/rutherfl/Downloads/math-g7-m1-copy-ready-materials.pdf

file:///C:/Users/rutherfl/Downloads/math-g7-m1-student-materials.pdf