This Forces Acting on Structures Build a Bridge STEM Challenge is the perfect, week-long, hands-on fun to add to your middle school force and motion science activities! Students learn about different types of bridges and compete to build a newspaper bridge stronger than anyone else's. This ready-to-go lesson has everything from comic-style content to a complete STEM activity. This download includes content, an animated slideshow, a detailed lesson plan, visual instructions, a web quest, follow