Wrenches ratcheted chains that clinked, a massive truck beeped while moving in reverse, children chuckled and skipped across the hard top in front of workers in hard hats—Brentwood School was awash in activity Friday morning as its pre-built, modular, eco-friendly classrooms were driven, lifted and lowered into place.

The green classrooms were built by American Modular Systems' Gen7 and they're designed to provide natural light and ventilation, as well as run on solar energy when needed, said John Zinner, Principal of Zinner Consultants, the company responsible for ensuring the project is up to LEED-certification standards.

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