Walla Walla, WA: High school with 35% of population SPED

May 8, 2018, Walla Walla (WA) Union—Bulletin: Walla Walla high schools aim for higher grad rates http://www.union-bulletin.com/news/education/walla_walla/walla-walla-high-schools-aim-for-higher-grad-rates/article_2b8f6c22-52e8-11e8-9165-4798c7d978fa.html The nature of Lincoln also means the school has a special-needs student population sometimes as high as 35 percent. Federal law allows those students to stay in school until age 21.