About facil.in
“Facilín” is Mexican Spanish for very easy. That’s the idea: finding where to learn should be simple.
What is it?
A tidy list of sites for learning online, grouped by topic, focused on science, technology, engineering and math (STEM), plus languages and music theory. We don’t sell anything, there’s no sign-up and no ads. Just links to resources that are worth your time.
How are sites chosen?
Every resource is free or open source. Some sites show ads, but none are free trials or put content behind a paywall. We favor trusted sources such as universities, museums and public institutions. Each link shows whether the content is in English, Spanish or several languages.
Notice
Links go to external sites. Their content and privacy policies are the responsibility of each site.