This paper summarizes our analysis of the complexity of ratio problems at Grades 6 and 7, and reports a two-year experiment related to the teaching and learning of rational numbers and proportionality ...

Jane-Jane Lo, Tad Watanabe, Developing Ratio and Proportion Schemes: A Story of a Fifth Grader, Journal for Research in Mathematics Education, Vol. 28, No. 2 (Mar., 1997), pp. 216-236 ...

This project brings together researchers in embodied cognition with researchers and technologists in inclusive design. With the PhET simulation Ratio and Proportion, learners can explore finding and ...

Free interactive and download to print GCSE Maths flashcards to help prepare for your GCSE exams. Revise topics such as ratio in context, percentages and direct and inverse proportion.

Learn how to convert ratios to fractions and percentages, how to share in a given ratio, and explore ratios as fractions, with videos, activities and quizzes.