A lesson is a run of small activities, mixed so no two days feel alike. Among them:
Vocabulary cards that bank new words into your review schedule
Fill-in-the-blank and multiple-choice grammar
Listening, read by Guðrún and Gunnar — two Icelandic neural voices
Speaking and typing practice, graded on what you actually produce
Pair-up matching
Conversation, where you answer in Icelandic
Culture notes
A boss battle, when a grammar topic needs settling
Which of these you get on a given day comes from your performance, not from a template — see “Why today looks nothing like yesterday”.