Education Technology

# Activities

• ##### Subject Area

• Math: Middle Grades Math: Measurement
• Math: Geometry: Similarity and Proportion
• Math: Math General: General

6-8
9-12

90 Minutes

• ##### Device
• TI-83 Plus Family
• TI-84 Plus
• TI-84 Plus Silver Edition
• TI-Navigator™
• ##### Software

LearningCheck™ Creator

• ##### Accessories

TI Connectivity Cable

• ##### Other Materials
A model of an actual object that students can measure (eg. a car, a container, etc.) Tape measures - I use tape measures that have both metric and English standard on them.

## What's the Scale?

#### Activity Overview

The objective of this lesson is to have students determine the scale of a model when compared to the actual object. They will measure parts of the actual object and then compare the corresponding part of the model to determine the scale used.

#### Before the Activity

Read and go over the Whats the Scale Lesson Plan. Modify the attached Lab sheet to insert a picture of the actual object you are using. I use my Honda Insight Hybrid car. I got the picture from the Honda website and the model from EWA.

#### During the Activity

Follow the lesson plan outline to introduce new concepts as well as review previous learning. You can use the Ratios and Proportions LearnCheck as a quick assessment on students prior knnowledge or as a quick quiz before the lab begins.

#### After the Activity

You can use the Ratios and Proportions review sheet as homework, review, or a quiz.