This video features the Louisville Slugger Museum and Factory, home to the world’s largest bat. Students see the role that measurement and engineering play in making bats to professional players’ specifications and are asked to consider the ratio relationship between the big bat outside the museum and a standard-size bat. In the accompanying classroom activity, students use proportional reasoning and equivalent ratios to determine how tall a statue of a ballplayer would have to be to match the height of the big bat. This resource is part of the Math at the Core: Middle School Collection.