It is possible to teach this course using a variety of materials. This document contains information on what I have vetted and what we currently use. However, I make ongoing and yearly adjustments to instructional materials.
The document gives information on the cost associated with the materials and where to source them. It also breaks down what my school, myself, and my students purchase though this is--of course--flexible based on your school's culture. Lastly, not everything on the list is vital to have all at once. You can pick and choose what materials you think you need as a class set and what materials students can share. The most important materials to get started are students who want to serve and a teacher willing to facilitate their service.
For a copy of the course syllabus and other relevant materials, please email me. I look forward to sharing all my SLL resources with you!