Sorry but it is not possible to download course materials.
But don’t worry you can choose and look at courses anytime on the website or mobile app.
When you have chosen a course you can see the titles of all the lessons in the course and you can see the slides for the first lesson in advance.
There are also a few pre-lesson slides that you can read to help you prepare for the lesson. These will introduce helpful words, discussion topics and sentence structures.
After each lesson you will be able to review the slides and the video on your account.