Ratio: Reducing to Simplest Form
Students are required to be fluent in the manipulation of ratios. This resource package provides a variety of activities requiring students to calculate missing quantities and totals using given ratios, including reduction to simplest form.
Visit the secondary mathematics webpage to access all lists.
Ratio Makes Sense
This resorce contains a number of activities. The activities appropriate to this topic are:
Under a magnifying glass in which students develop an understanding of ratio by calculating the actual length of objects which have been enlarged by a scale factor.
Cooking numbers is designed to develop an understanding of ratio by solving problems in the context of cooking recipes.
Ratio problems provides a number of problems in real life contexts for students to solve using their knowledge of ratio.
Unibond mixtures and Record breakers provide further opportunity for students to practise applying knowledge of ratio to solve problems.
Focus Year 7/8 Number Extension
This resource uses games, puzzles and investigations to support the development of the concept of ratio. The contents appropriate to this topic are in Section 7 Rates and ratio on page 51 of the text (p.53 of pdf).
In this section, many everyday contexts which use rates and ratio are considered. Students develop the use of 1:n notation and proportionality to solve a range of different problems.
Ratios and Proportions
This video demonstrates a practical application of ratio and proportion as preparations are made for a dinner party.
The number of guests attending requires the adaptation of recipes for both food and drink. Graphics are used effectively throughout the video to explain ratios as a 'part to part relationship' and proportion as a 'part to whole'.
Calculations are performed in stages throughout the video, offering a pause point for teachers to hold a freeze frame on screen while students discuss the problem and perform the calculations themselves.
Ratio and Proportion
The textbook Ratio and proportion looks at equivalent ratios and simplifying ratios and considers the idea of direct proportion to find missing quantities.
The activities sheet contains two activities. Price ratios explores which foods give the best value for money. Page sizes investigates the ratios to be found when dealing with different paper sizes.
