Planet of the Zebras

The rules of high school football are
derived from collegiate rules.

NCAA Rules and Interpretations, 2009-2010

Few high school coaches have seen or read a current official high school  football rulebook published by  the NFHS which stands for, um..."Federation"
once I saw a copy of the federation rules in a coaches' office. I picked it up off the floor, noted that it was a couple of years out of date. someone had begun to read it, underlined a few passages , and given up on page fourteen. Little wonder, the presentation leaves a lot to be desired, and the wording appears to have been do of high school football,ne by teachers, no, "educators". I asked my colleague and mentor, a veteran of over a quarter century,of high school football, about his  familiarity with the with the book. "Aw, i never read those things," he said.

Somebody out in Colorado, presumably an affable zeeb, prepared this crib sheet to keep  coaches  from breaking  into the zebra den and taking the  county  association's Authorized Version of the NFHS Rules.
 NCAA/NFHS Football Rules Differences 2009

Remember, children: high school football rules have nothing whatsoever to do with the made-for-TV farce that is the No Fun League. The purpose of the NFL is to sell beer. NFL football can be appreciated, nay, tolerated , only by inebriated individuals. Persons who are too young to buy, sell, transport, serve, or consume alcoholic beverages have no reason to watch NFL football.

More about the zeebs than you ever wanted to know at Football Refs.org:
Rules revisions year-by-year