washingtonpost.com: While students at an all-girls school in Montgomery County were laboring one day last month to build bridges out of popsicle sticks, their teachers were trying to build bridges for them into the male-dominated field of engineering.The popsicle-stick bridges shattered under 60 pounds of pressure. Teachers at the Holton-Arms School in Bethesda hope their seemingly unique engineering course will make girls’ interest in the field last longer."It’s about taking risks and getting them over the anxiety of always having to be right all the time,” said physics teacher Chris Lee, who designed the course four years ago.