## Ratio, Proportion and Animal Identification

## Standard

CCSS.Math.Content.7.RP.A.1 Analyze proportional relationships and use them to solve real-world and mathematical problems.

## Time

60-70 minutes

## Technology Required

A computer, phone or tablet with Internet connection is required to watch the video and play Making Camp Navajo. If these are not available, the assignment can be printed out and distributed to students or shown in the classroom on a projector with computer.

## Summary

Students hear or read a presentation on ratio, percentage decrease, rate and proportion. They watch a short video on ratio. Students collect data either outdoors or using images provided. They then compute ratio, rate, increase and proportion using the data.

## Lesson

### Review the concepts and introduce the assignment

Begin with this presentation that explains ratio, rate, percentage increase/ decrease and proportion. The presentation also introduces the assignment students will complete. There is a video included in the presentation on ratio. If you have difficulty playing the video Atlantean Dodgeball, in the presentation, here is the direct link.

### Students complete data collection, ratio, rate and proportion assignment

There are four options for completing this assignment, depending on your environment. Ideally, students would collect data outside, but if you are in the middle of the city or it is winter and there are no animals around, you may want to select one of the other options. Allow students to choose one of the four options or delete whichever does not fit your situation.

If observing animals outside is not an option, here are two images your students can use to identify animals. Click the link for an image you can save in your Google classroom.

Scene 1- Animals in the savanna

Key for scene 1 – Image with animals labeled

Names of the 23 animals in scene 1

Key for scene 2 – Image with animals labeled

Names of the 24 animals in scene 2

### Play Making Camp Navajo

Play the Making Camp Navajo game to learn more about ratio and equivalent ratio.

(Available Fall, 2021)

### Individualizing instruction (optional)

The presentation discusses the animal kingdom and the six kingdoms many biologists use for classification of living organisms. For students who are particularly interested in this topic, the post, “Are insects animals?” can be provided as supplemental reading or teachers may wish to print this out for students who do not have home Internet access.

#### RELATED LESSONS

These two lessons are recommended for students prior to this assignment.

- Teach ratio with Math Snacks – introduces ratio in the context of a bad date.
- For another introduction of ratio, see the lesson Introduction to Ratio and Proportion.