Terms of use
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Free to learn
All learning content on this site is free for personal use: study with it, practice with it, use it in your classroom, and share links to any page. That is what it is for.
Accounts
An account is optional and free, and it never unlocks anything — it only remembers your progress. You must be 13 or older to create one, and where local law sets a higher age for consent to online services, a parent or guardian must agree first.
Sign in with an email address that is yours, and keep access to it: there is no password, so that address is the only way in. Do not sign in as anyone else.
Acceptable use
Use the site to learn. Do not try to break, overload, or probe it; do not scrape it in bulk; do not use it to send unsolicited mail; and do not interfere with anyone else’s use of it. Automated traffic that degrades the service for other students is not welcome.
Ending an account
You can delete your account at any time from your account page, and that deletion is immediate and complete. We may suspend or remove an account used to abuse the site or other people. Losing an account never costs you access to the learning content, because that content was never behind an account to begin with.
Ownership
The lessons, interactive widgets, practice generators, and design are the intellectual property of this project. You may not copy, scrape, republish, or redistribute substantial parts of the site — commercially or otherwise — without written permission. Linking is always welcome.
No warranty
This is an educational resource, provided “as is”. We work hard to keep every explanation and answer correct, but we cannot guarantee the site is error-free or that it fits any particular purpose, including any particular exam result.
Not affiliated with any test maker
This site helps students prepare for standardized tests but is independent: it is not affiliated with, endorsed by, or connected to any testing organization. Test names are trademarks of their respective owners and are used only to identify the exams.
Future paid tools
If and when optional paid tools launch, they will come with their own purchase terms, shown before you buy. Nothing that is free today will move behind a paywall.
Governing law
These terms are governed by the laws of Chile.
Questions? Write to [email protected].