Engage your students in critical thinking, teamwork, and visual communication with this no-prep Academic Spark Challenge!In the Billboard Challenge, teams must design a wordless billboard that visually communicates a big idea or academic concept—without using any words or numbers! Perfect for upper elementary and middle school, this flexible challenge supports ELA, science, social studies, math, and SEL standards. What’s Included: Complete Teacher Guide (materials, setup, facilitation tips,