First Step Korean vs Duolingo English Test
Same Bayesian formula, same rubric — so the difference in scores reflects the difference in the courses, not the difference in how we evaluated them.
Coursera (Yonsei University) · Languages
First Step Korean
Duolingo · Languages
Duolingo English Test
Per-criterion
A tightly structured five-week introduction that takes you from the Korean alphabet (Hangeul) through greetings, family, daily life, ordering food and basic schedules. Learners repeatedly praise how clearly Hangeul is explained and how useful the everyday topics are. Capped because it is explicitly a "first step" — it covers survival vocabulary and a little grammar, not the systematic grammar foundation an intermediate learner needs.
Instructor Seunghae Kang is the single most-praised element across the corpus. Reviewers call her clear, warm and easy to follow, and credit her delivery for making Hangeul "so simple." The main reservation is speech speed — several learners found the spoken Korean fast and wished for slower modelling — but teaching quality itself is rated very highly.
The course is free to audit, including all video lectures and quizzes, with payment only required for the optional certificate. For a university-produced course from Yonsei with 53,000+ ratings, a free, classroom-structured Korean primer is exceptional value — reviewers repeatedly flag the "free resource with a classroom structure" as the standout.
Quizzes, role-plays and the immersive practice segments keep most learners engaged through the five weeks, and the short, topic-based format suits busy schedules. Marked down because the brisk pace and lack of spaced repetition mean motivation can dip for absolute beginners who feel they are falling behind in the first week.
As a free MOOC there is no tutor or live feedback; help comes from auto-graded quizzes and peer discussion forums. The most-cited concrete gap is the absence of a pronunciation key or phonetic transcriptions on the reference sheets, which several learners say left them guessing at how words actually sound.
The everyday topics — introductions, family, food, daily routine — transfer directly to first real conversations and travel, and learning to read Hangeul is a genuine, lasting skill. But it is one step: reviewers are clear you will not approach conversational fluency from this course alone and will need further study to build on it.
Adaptive difficulty and integrated skill design are genuine strengths. Weakened by the absence of a formal essay (only a 5-minute writing sample), opinion-based speaking prompts, and a perceived lack of academic rigour versus IELTS and TOEFL among experienced practitioners.
No published answer keys, rubrics, or section-level guidance — the weakest methodology dimension. Some test-takers receive a score range spanning three CEFR levels rather than a single number, making preparation harder than for IELTS or TOEFL.
$65 per attempt with unlimited free score sends versus $220-plus for IELTS. 48-hour results and no test-centre booking add further convenience. The primary reason test-takers choose the DET over alternatives.
At-home, on-demand testing removes scheduling friction and supports repeated attempts. Three-tier human review provides oversight. Weakened by documented AI false-flag incidents and a 72-hour appeal window that can frustrate test-takers.
6,000-plus programs in 110-plus countries accept it, including 98 of the US News Top 100 universities and all Ivy League schools. IELTS is accepted by 12,500-plus organisations — more than double. UK/Australian visa routes and professional bodies don't yet accept at-home tests.
Scoring methodology applies identically to every course on the site — see the formula.