There are two courses on Ashtanga, one being the Primary Series and the other the Intermediate Series. Both courses actually come in two versions, one is called traditional and the other non-linear. The content is the same in both versions it is just how you access the material that is different.
The traditional version only allows you to progress one lesson each week taking a linear route through the course one posture at a time. This is really the preferred version because it slows you down and gives you time to integrate the lessons into your practice before moving on. However many students have chunks of time become available and they want to dive deep while they can, so we have the non-linear version that will let you jump forwards and back as much as you like and progress through the course as quickly as you like. With both versions you have no time limitations of access so you will always have the opportunity to dip in and out as life sends you curve balls.
You can find out more about all the courses on the courses page or click on one of the course highlights below to go to a specific course.