Free software is simply software that respects our freedom — our freedom to learn and understand the software we are using. Free software is designed to free the user from restrictions put in place by proprietary software, and so using free software lets you join a global community of people who are making the political and ethical assertion of our rights to learn and to share what we learn with others.
As for a beginning here is the OSI "Open Source Education" materials, OSE actively promotes open source software by educating developers, decision
makers, and users about the advantages of open source software and
collaboration techniques. And others materials from The Free Technology Academy (FTA), FTA is a joint initiative from several
educational institutes in various countries. It aims to contribute to a
society that permits all users to study, participate and build upon
existing knowledge without restrictions.
In a near future we will publish new free (libre) "materials", presentations, courses and webinars.
Some incubating materials by the le OSLM education