-The first video would be a great launch for this lesson.

-Today we are going to talk about a way to organize the relationships between corresponding sides of similar figures. This will be done using proportions which are two equal ratios.

-The second video attached below is full of content on how to not only set up and label a proportion, but it also emphasizes the use of a scale factor.

-Once both videos have been viewed, have students practice on a few basic proportions provided to them via slideshow presentation (attached). They can use their whiteboards to display the answer to each part of the slideshow practice problems.

-Have them practice using scale factors to determine the missing value until they are comfortable.

-Introduce them to the dirt bike proportion game and play a round with them coaching you along. I suggest you miss a few to show them that accuracy is important or the dirt bike slows down instead of speeding up.

-Show them how to sign up and find people to play against. I recommend that you experiment with the game so you are familiar with how to set up a private game with a password. (Keep your school's Acceptable Use Policy in mind)

-Students who use your private game should be able to race against you and their peers.

-Make sure that everyone takes a turn with the game before you assess with an exit pass or group question. Both the practice problems and the exit pass are available on the attached presentation.

-The student will learn that similar figures have sides that are proportional. They will also learn to find a missing part of two similar figures using the scale factor. Using this information, they will evaluate real life uses of this concept. Students will also learn how to find missing values in a proportion quickly and efficiently