All About Ratios

What do fractions and ratios have in common? What is unique about fractions and what is unique about ratios? Lead a discussion and model some examples. Then, pose some questions and have your mathematicians set up the ratios. Check for...

Upper elementary and middle school pupils fill out a chart creating six equivalent fractions and then compare them to six different objects and/or shapes. They group together 16 various terms related to ratios and proportions. Pupils...

This turn-key unit on ratios and unit rates walks through a 30-lesson unit on teaching proportional reasoning, with each lesson broken into detailed teaching notes and time allotments for all parts. An unbelievable resource when taken...

Enlargements and reductions are all about scale. The lesson introduces scale drawing to the class. Pupils determine whether the drawing is a reduction or an enlargement and the constant of proportionality between the original and the...

At this rate, you'll know all about ratios in no time. Scholars view a short video that discusses advanced concepts regarding ratios and rates. They first determine the speed of a subway from a graph, and then find unit rates given...

Sal defines ratios. Then he shows how to write ratios three different ways. This concept is then demonstrated with four examples for finding quantities by using ratios.

Converting units are ratios in disguise and can be easy solve. Although this video is the last in a series about different methods to solve ratio problems, it does not have to be used in conjunction with this series. It introduces the...

Organization is the best way to make sure that ratios are set up correctly to be proportional. This video reviews how to solve ratio problems with addition and multiplication, shown in more detail in the prior two videos of this series,...

Show your learners what a part-to-part ratio can look like with this pancake recipe. The video shares how ratios can change when one part changes, but they are still equal. Demonstrate to your learners how to set up initial ratios in the...

Grandma knits one pink sweater for every five. After this video your learners will be able to translate that into a ratio. Use the video to help visualize how this ratio can be written equivalently. The video is the second in a...