The current education system is severely flawed. It teaches you what to think, rather than how to think, discover and explore. It excludes important subjects that will be used in daily life: politics, philosophy, basics of how the world works, economics, human behaviour, practical skills, and other advice that is practical to everyone irrespective of their future profession.
EdX – Free online courses in a wide range of subjects
Coursera – Free online courses in a wide range of subjects
Codecademy – Free online coding courses (html, css, java, sql, command line, etc.)
Orcam Group: Understanding money, economics and finance
List of 40 free educational websites
CrashCourse: Crash courses in a variety of topics (videos)