Any work of fiction written by Yudkowsky will count, not just HPMOR

but nonfiction (e.g. An Intuitive Explanation of Bayes Theorem) will not count, and the work must be at least 50,000 words.

It must be an entire school district, containing >300 students, anywhere in the country.

The administrative leadership of that school district must at least indicate tacit approval of the implementation, even if it is not unanimous.

If a single teacher or group of teachers decide to informally recommend the book in exchange for extra credit, it does not count. However, if it is formally offered as extra credit in all upper level or "gifted" classes, it will still count, so long as it ultimately ends up being read by more than 100 students in that school district.

Private schools and homeschooling will not count, unless they are closely networked into a chain that contains more than 3000 students, and more than 75% of them will be required to attempt to read at least the first 50,000 words of HPMOR or the approved Yudfic.