The post office is an important place in our communities. Kids will learn about why post offices are needed, who works there, and what kinds of things happen there. Aligned to Common Core Standards and correlated to state standards. Abdo Kids is a division of ABDO. Translated by native Spanish speakers--and immersion school educators. Aligned to Common Core Standards and correlated to state standards. Abdo Kids Junior is an imprint of Abdo Kids, a division of ABDO.