Comprised of a carefully curated combination of learning units, Learning Tracks - which can be assigned as Missions - have been created specifically to help you master the language of a particular area of focus. They are organized by subject or theme, with a diploma awarded once you score a minimum of 750 points on each exercise.
A Learning Track can consist of any number of exercises, which can be played and completed in any desired order. To obtain the diploma for the Learning Track you're working on, you have to obtain a score of at least 750 points in each exercise. You may also see suggested optional content, which however you are not required to play in order to complete the track and obtain a diploma.
The time needed to complete a Learning Track and obtain the diploma depends on the number of exercises in the the track, and of course your ability to score at least 750 points on each exercise. Exercises or their individual steps can be replayed to increase your score on that exercise. In general, each exercise takes about 20 minutes to complete.
To obtain a diploma in a Learning Track, you have to obtain a minimum score in all the learning units in that track. Two types of diplomas are available for a Learning Track: if you obtain at least 750 points in each unit of a track, you earn a Diploma. If you obtain at least 900 points in each unit of a track, you are awarded a Diploma with Honors.