Guide
Study a lesson
A lesson is the smallest useful body of knowledge for the fundamentals.
Open a subject and the first thing you see is what the idea is. The essentials and one example are the lesson. Extra depth is available, but it is not forced onto that first page.
The lesson menu sits beside the reading area on a wide screen and opens over it on a phone. The main area is Read, a short check, and Go Deeper. Listen sits on the same reading page. Practice — Quizzes or Games — is a separate step when you want to check yourself.
How to
Open a subject from Explore or from a map. You land on the idea, not a table of contents.
Read the essentials, then the example. The example is there to make the idea usable, not to add a second course.
Use the check on that page to see if it landed. It is against the lesson, not a separate exam.
Use the sidebar to move between lessons in the same subject. You do not need every lesson to say you understand the fundamentals.
Stop when the essentials are enough. Open Listen on the same page, a quiz for the subject, or Go Deeper only if you want more.
What you will see
- A short lesson: what it is, the essentials, and an example.
- A check on the same page. A sidebar (or a menu on a phone) for the other lessons.
- Go Deeper, Sources, and Originals when you want more than the fundamentals.
If you get stuck
- The subject feels long: finish the first lesson and stop. Later lessons are optional.
- The check feels small: that is the point. A full set lives under Quizzes.
- You want sound: use Play on this page. You do not open a second course.