One of the many technologies Hubbard developed over his lifetime is study tech. It has helped millions to improve their ability to learn including Tom Cruise. In fact, the impact of study technology cannot be underestimated in our society. Check out some of the impacts it has had:

http://www.effective-education.org/pg008.html
http://www.able.org/pages/aps.php  ¶ 2:50 PM