Download here the 2022 edition of the N̓səl̓xčin̓ 1 book by Sʕamtíc̓aʔ Peterson, LaRae Wiley & Christopher Parkin.
This book is the first in the N̓̓səl̓̓xčin̓ Curriculum Project of six textbooks with accompanying materials that is being developed by Salish School of Spokane and The Paul Creek Language Association.
You can also download here lesson plans for all lessons in the n̓səl̓xčin̓ 1 book, as well as the Direct Acquisition Activities Teacher's Manual that goes with the book.