Who
A French nonprofit association declared in Paris on 13 May 2026, run entirely by volunteers: its members design, publish, and administer everything themselves.
Nonprofit association · Declared in Paris
Education accessible to everyone, free of charge.
ODERSA (Organisation pour le Développement de l’Éducation, des Ressources et des Savoirs Accessibles) is a French nonprofit association (loi 1901). We design and publish free, openly licensed educational resources with no data collection, and run occasional activities on the ground. Everything we put online can be verified in a few clicks.
- Open content, CC BY 4.0
- Zero data collection
- Free, no account, no ads
The proof, in figures
The proof, in figures
1project online, open to all
750training cases published, recountable
7complete languages, including Arabic, Hindi, and Bengali
0data collected: no cookies, no trackers
Figures counted on 24 July 2026, and anyone can recount them: see the method
In ten seconds
In ten seconds
What
Free educational resources online, with no account and no ads, published under the open CC BY 4.0 license and ready to reuse in class or in a workshop.
Who for
Students, teachers, activity leaders, families, the curious: in France and worldwide, with content designed for several languages from the start.
Our online project
Our online project
Avant d’y croire
Online since 22 July 2026Avant d’y croire (French for “Before believing it”) teaches how to check a piece of information before believing or sharing it: 10 habits explained simply and 750 interactive training cases, in 7 languages. Misleading headlines, images taken out of context, fake experts, distorted figures: you practice on concrete cases, at your own pace, with no account to create.
Teachers and activity leaders can reuse all of it freely: the content is under the CC BY 4.0 license, the data downloads as JSON, and a workshop booklet prints in a few clicks. The site works on a phone and stays available offline after the first visit.
Our mission
Our mission
“To promote and make accessible to all, free of charge and without any commercial consideration, education, training, and the transmission of knowledge.”
Articles of association, article 2 (excerpt, translated from French)
This mission covers school, university, professional, cultural, and civic education, in France and internationally. It shows in every everyday choice: free access with no conditions, open licenses, and public figures anyone can recount.
Start at the right door
Start at the right door
The association
Our mission, our complete legal record, our governance, and how we run on volunteers.
Who we are →Our approach
Five commitments kept by design, each one paired with a way to check it yourself.
Read our commitments →Work with us
What we bring to a partner, what we are looking for, and the simplest way to start.
See concrete options →What’s new
What’s new
odersa.org opens its doors
The association’s institutional site is online: who we are, our approach, our verifiable figures, and how to work with us. In French and English.
“Avant d’y croire” is online
Our first project is open to all: 10 habits for checking a piece of information and 750 training cases, in 7 languages, free and open to reuse (CC BY 4.0).