Looking for middle- and high-school reading passages? www.CommonLit.org is a FREE collection of hundreds of nonfiction texts, short stories, poems, news articles, historical documents, and more. All come with a rigorous question set, discussion guide, paired passages, and related media.
5,000 Words: Four Scenes. I’m currently writing a series of short stories, each of which is under 5,000 words in draft form: http://www.fabfreelancewriting.com/blog/2014/05/08/writing-short-stories-fast-scene-secret/#