That’s how it goes with portable classrooms in the Pacific Northwest. There aren’t any state rules for how many portables school districts can use, or how long they can use them.

Every day in the U.S., hundreds of thousands of teachers go to work in portable classrooms. These teachers and their students face challenges such as limited space and difficult access to bathrooms.

The modular classroom was named an official “Oregon Solutions” project. This program, established in 2011, promotes “sustainable solutions to community-based problems that support economic, ...

As student enrollment has climbed in Montgomery County, many parents have expressed concerns about the growing number of portable classroom trailers located at the Maryland district's 202 schools.

John F. Kennedy High School in the San Fernando Valley is in the midst of a $274 million renovation that includes replacing dozens of aging portable buildings. And it's funded by a very old bond.

The 6,000-square-foot, detached modular building behind Waller Mill Elementary School in York County adds six full-sized classrooms, a main hallway and bathrooms.