The Bridge Test
On Friday morning, Ms. Alvarez's class would finally test the toothpick bridges that each team had been building for two weeks. The rules were demanding: a bridge had to span thirty centimeters between two stacks of books and hold a jar of coins without collapsing. Ines, Theo, and Wen had spent every lunch period gluing, and Ines was convinced that theirs was the most impressive design in the entire room.
It was not. When Theo gently lowered the jar onto the middle, the bridge groaned, sagged, and folded into a heap of splinters and glue. Nobody spoke for several seconds. Ines stared at the wreckage, her cheeks burning with embarrassment, and then muttered that they should simply hand in a written report because there was no time to start over.
Theo glanced toward Wen, who had hardly said a word since the project began and was quietly turning a broken piece over in his fingers. "The flat sections bent first," Wen said at last. "Look at this. Wherever the toothpicks formed triangles, they stayed strong. A triangle cannot squash sideways the way a rectangle can."
Ines blinked in surprise and asked why he had not mentioned it earlier. Wen admitted that he had assumed everyone was satisfied with the plan, and he had not wanted to ruin their excitement.
Ms. Alvarez generously gave the team until the end of the day. They gathered fresh toothpicks, and this time Ines listened carefully while Wen sketched an improved design: a row of triangles along each side, with crossing braces underneath. Theo mixed the glue while Ines carefully positioned each toothpick, and by the final bell the new bridge was standing between the stacks of books, looking far sturdier than the first one.
Theo lowered the jar once again. The bridge creaked softly, but it held. Ines grinned and turned to her quietest teammate. "From now on," she said, "you talk first."