Students will take photos where everyone in the photos all appear to be the same height. They’ll use the Calipers Tool to collect data and will create a graph of object height vs. object distance for everything in the photo.
Exploring Direct Proportional Relationships
Expected Activity Time
Part I: Everyone is Equal Activity (20 minutes)
Part 2: Data Exploration (20 minutes)
Achieve equality! In a photo, anyway. Take a photo of the whole group, making everyone look like they are the same height in the picture. Stand up straight, everyone!
Have students stand up straight with two or more friends so that they all appear the same height in the camera view. Students should:
Prompt students to make observations and encourage students to use ratio language and reasoning while completing the challenge.
Language and discourse to listen for:
If image height is standardized across photos (e.g. all are an equal image size), they can plot the whole class’ data on one graph and discover direct proportional relationship between object height and distance. Another fun way to standardize the image height is to choose a virtual prop from the virtual prop library to put in the photo.
Have students research the heights of other people and objects. Once students have uncovered the directly proportional relationship between object height and object distance, they can use that proportional relationship to calculate the positions these objects should stand in order to make their image size “fit” in with the virtual prop (see Strike A Pose activity).
Part 1: Everyone is Equal
|Group Member||Actual Height||Image Size||Distance from Camera||Ratio:Actual HeightDistance from Camera|
Do you notice patterns in the data? Please describe.
Part 2: Data Exploration
What do you notice about the actual heights of your group members versus their distances from the camera?
|In Camera Mode, you will use:|
|To enter and calibrate the height of individuals, objects, and group members.|
|To reflect on the things they notice about the pictures they take.|
|To see how image sizes of subjects relate to one another.|
|In Gallery Mode, you can use:|
|To compare data across 4 pics (e.g., distances one has to stand to get different image sizes).|
|Write ratios seen in the photos they took.|
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