How a lesson works

Each lesson takes about ten minutes. It starts with a short video. The video pauses at checkpoints so you can answer a question before it goes on.

Questions come in a few forms: pick an answer, fill a gap, or put pieces in order. You get feedback straight away. Labs let you write and edit a prompt of your own.

You can leave a lesson at any time and your place is kept. Lessons that are done count toward your certificate.

Under or beside each video there is a transcript of what has been said so far, and the video has English captions.