Portable classroom building.  This building has probably been divided internally into two classroom, needing two separate entrances.  This building is at Rock Creek Elementary School (Beaverton School District, but this location is not in Beaverton), in the unincorporated <a href="https://en.wikipedia.org/wiki/Rockcreek,_Oregon" class="extiw" title="en:Rockcreek, Oregon">Rock Creek</a> area of Washington County, Oregon.
<a href="//commons.wikimedia.org/wiki/User:Steve_Morgan" title="User:Steve Morgan">Steve Morgan</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>