Here you can access a variety of government resources on Asian/Pacific Islander American history including from the Library of Congress and National Archives.
The page includes links to primary source documents on immigration history as well as important events to remember like the Japanese-American internment during WWII.
A section for teachers is also included.
For local history, try this Encyclopedia of Washington State History. Click "Search" at the top, then under the categories that appear, click "Asian & Pacific Islander Americans" and hit the orange Search button.
(Photo above: Japanese-American actor George Takei as Hikaru Sulu in the original Star Trek series. Takei has become an outspoken proponent of immigrant rights. From Wikimedia Commons.)