For a listing of textbook series, with links, please see below:
Faith and Life
https://www.ignatius.com/promotions/faithandlife/downloads.htm#parishlessons
They have PowerPoint slides to go with all of their lessons.
Christ Our Life
https://www.loyolapress.com/faith-formation/christ-our-life/christ-our-life-2016/parents-and-students/grades-1-8/grades/grade-1
Alive in Christ
https://reply.osv.com/AIC_OnlineResources
Sophia Press
https://sophiainstituteforteachers.org/
Communication Center
The Communication Center has worked with various textbooks to consolidate online resources.
https://www.comcenter.com/