All text courses

Twenty text courses, one per LLM family or grouping, cover popular and less popular families. Each course has 12 lessons in order: what the family is, how courses teach it, first steps, prompting, checking outputs, limits and safe use, practice projects, common mistakes, comparison, choosing a further course, staying current, and a study plan. Small family courses are free and complete; big family courses have free text lessons now with a paid tier planned later, not available now. See also the courses index, which groups courses by free-complete and future-paid structure.