I have taught to high school students from all of these below.
The Law, Economics In One Lesson, Defending The Undefendable, all of Thomas Woods' books, The Left The Right and The State, Fascism vs.Capitalism, What Has Government Done to Our Money?, The Ethics of Liberty, For a New Liberty, Conceived in Liberty, A History of Money and Banking, The Real Lincoln, Hamilton's Curse, How Capitalism Saved America, ten or so Walter Block books, EPJ, Target Liberty, FFF, mises.org, fee.org videos, podcasts from Lew Rockwell, Woods, and more. That is off the top of my head.
Btw I start with teaching the NAPUPDATE:
How can I forget I use The Revolution: A Manifesto by Ron Paul all the time too. Also Anthem and Atlas Shrugged, Andrew Napolitano books and will in the futrue use The Problem with Socialism ,