3. GoalsThe goal of Duolingo is to
get people to learn the
language, and each unit has
a "strength bar" which
corresponds how many
words or constructions still
exist in the user's memory.
After a certain duration of
time, strength bars fade,
indicating a need for a user
to refresh/re-study that
lesson, or to "strengthen
weak skills."
4. Duolingo offers extensive written lessons
and dictation, but it features less speaking
practice. It has a gamified skill tree that
users can progress through, and a
vocabulary section where learned words
can be practiced.
