About the project
Revision Hub is a set of free revision sites for EDHEC BBA1 courses, made by a student for classmates.
It is an independent project. EDHEC Business School does not run, check or endorse it.
Revision Hub is a joint project with a partner site: the two sites are gathered on one main page.
- Main page
- nexusandhub.com
- Partner site
- Nexus (nexus-revision.com)
- Its publisher
- Christo Czysz
- Its contact
- christo.czysz@edhec.com
The lessons follow the courses. The cases, companies, questions, generators and tools are written for the hub. Mistakes can happen: your course material and your teachers come first. If you spot one, write to the contact below.
Legal notice
- Publisher
- Zadig Colin, a student publishing the hub as a private individual
- Director of publication
- Zadig Colin
- Contact
- support@revision-hub.fr
- Host
- Cloudflare, Inc., 101 Townsend St., San Francisco, CA 94107, United States
- Host's phone
- +1 650 319 8930
- Host's website
- www.cloudflare.com
This notice covers Revision Hub only. The partner site and the main page have their own publishers and legal notices.
Terms of use
Using the hub means you accept these terms. The hub is free, and you need no account to use it. To create an account, you tick a box to accept them.
- The hub helps you revise. It does not promise any grade or exam result.
- The hub is free and offered as it is: its lessons and answers can contain mistakes, and it can change, pause or stop at any time.
- Ask AI answers come from an AI model and can be wrong. Do not type personal information into it.
- Reviews are not checked before they appear: they are public as soon as they are posted, with their date. Spam, insults and links are removed. Write only what you are happy to see published; your first name is optional.
- An account is personal: use your own e-mail address, keep your password to yourself, and make only one. You can delete your saved progress, or your whole account, at any time from your dashboard.
- The same account works on Nexus, the partner site, which has its own terms.
- An account or a review that breaks these terms can be removed.
- Do not try to break, overload or copy the hub, its questions or its data.
- These terms can change. The date at the bottom of this page shows the version in force, and your account keeps the date of the version you accepted.
- These terms follow French law.
Your data
The hub collects as little as it can. There is no advertising, no tracking cookie and no visitor statistics. Zadig Colin is responsible for the data described here (the data controller): write to support@revision-hub.fr.
- On your device
- Your scores, flashcards, Night / Day and language choices, your login and your number of Ask AI questions today are kept in your browser's storage. They stay on this device, unless you log in to an account. This storage only serves the hub's own features and is never used to track you, so it needs no consent banner.
- Ask AI
- Your question and the conversation so far are sent to Groq, Inc. (United States), whose AI writes the answer. The hub does not keep them.
- Reviews
- Your stars, your text, your first name if you give one and the course are stored with the host and shown to everyone, until the review is removed.
- Accounts
- Your name, e-mail and password are kept by the login service, Supabase, on its servers in Stockholm (Sweden), with the date you accepted the terms of use. Your password goes straight to it: the hub never sees it. Its e-mails to you (to confirm your address or choose a new password) are sent through Gmail (Google). Your results and your time on the site are kept with the host under an account number, without your name or e-mail. All of it is kept until you delete it: Delete my account, on your dashboard, deletes your account and your saved progress. The same account also works on Nexus, the partner site, which keeps its own results.
- Google sign-in
- If you choose Continue with Google, Google gives the login service your name, your e-mail address and your profile picture, and Google knows you signed in to the hub. The hub uses only your name and e-mail.
- Hosting and fonts
- The host named in the legal notice receives your IP address to send you the pages. To block abuse, such as too many requests in a minute, the hub counts requests under a scrambled form of your address and forgets it after that minute. The fonts come from Google Fonts, which also receives your IP address.
- Why, and on what basis
- Your account, your saved progress, Ask AI and the account e-mails give you the service you ask for: their basis is these terms (GDPR, article 6(1)(b)). A review is posted because you choose to: its basis is your consent, which you can withdraw by asking for the review to be removed. Your IP address is used to send the pages, to block abuse and to load the fonts: the basis is the hub's legitimate interest in working safely (article 6(1)(f)). No decision about you is ever made automatically.
- Outside the EU
- The host, Groq and Google are based in the United States. The host and Google say they comply with the EU-U.S. Data Privacy Framework; Groq uses the European Commission's standard contractual clauses. Supabase is also based outside the EU, under the same clauses, but it keeps the accounts in Sweden.
- Your rights
- You can ask to see, correct or delete your data, to receive a copy of it, to limit its use or to object to it: write to support@revision-hub.fr, and you get an answer within a month. You can also complain to the CNIL, the French data protection authority (www.cnil.fr).
Copyright
© 2026 Zadig Colin. The hub's design, code, texts, made-up cases, question banks and generators are protected by copyright. Do not copy or republish them without written permission. Using them to revise, and sharing the hub's link, is welcome.
EDHEC is the name of EDHEC Business School, and the course names refer to its programme. TOSA is a certification by Isograd. Microsoft, Word and Excel are trademarks of Microsoft Corporation. They are named only to describe what the hub helps you revise; none of them is linked to the hub.
The partner site and its content belong to its author.
The hub also uses open-source work:
- Univer
- Apache licence. It runs the spreadsheet in the Excel tasks.
- Fluent System Icons
- MIT licence, by Microsoft. They draw the Word ribbon.
- Geist · Geist Mono · Atkinson Hyperlegible Next
- SIL Open Font Licence. They are the hub's fonts.
Prices and sales
Nothing is sold today: every part of the hub is free, and no payment can be made.
Before any paid plan opens, its terms of sale will be published here: the seller's full details, the price, payment, cancellation and your right of withdrawal.
Last updated: 3 November 2026