Then you play with it, listen to it and prove it. Short chapters that work on a phone, on a slow connection, in your second language.
Read it, play with it, listen to it, prove it. Use all four, or only the ones that suit your day.
A question from your own life first, then the idea that answers it.
Live diagrams and small labs you can poke at, so the words turn into something you have seen.
Every chapter can be heard, word by word, at any speed from 0.75x to 4x.
A short quiz with no timer. Questions stay hidden until you press Start, so the result is yours.
Dot never nags and never blames. It shows up at the right moment, says one short thing, and gets out of your way.
Tech skills and human skills, side by side. Here are a few of the questions courses start from, and more are on the way.
Streaks and points help on the days you need a push. Leaderboards are your choice: your cohort, only your own last week, or nothing at all.
Make an account only when you want to keep your progress.