Barton Reading and Spelling is user friendly and can be purchased from the BartonReading.com site. My son was offered Barton through the cyber charter school that he is enrolled in. I’ve used it with him independently, virtually.
It is nicely scripted so it’s easy for the parent tutor.
DVD instructional videos for the tutor explain each level and key points, and Susan Barton offers product support. Great O G-influenced program for those who do not have the resources to hire expensive tutors. I highly recommend it!