This is the full list of A2-B1 appropriate lesson currently available.
Couple of points:
1. The lessons are not organised into any specific/logical course sequence. Please see this course for a suggested A2-B1 course: Level A2-B1 Course
2. We are starting to publish a new series of lessons under the 925English brand which are designed specifically for A1-2 learners. There are only 3 lessons in this series currently available, but a regular weekly publishing schedule starting in May-June of this year. So these could be added to any future A2 course as they are published.
Not: Lessons that are selected/shown complete in this list are most appropriate for A2 level (the unselected lessons are more in the B1 range).