Modern Curriculum Press Plaid Phonics is a secular phonics program designed for Kindergarten through 3rd grade. Additional books are available for grades 4-6 on word study skills. Read more about them at the ChristianBook website.
Comment: I used this for my daughter last year for her first grade year. I bought the second grade level for her though . She really enjoyed it. In the teachers manual it literally walks you through what to teach and also includes spelling. If you use the program as intended it's wonderful . The above comments make me wonder if she just bought the workbooks which I definitely do not recommend. My only complaint is it didn't have any readers other than the paper mini books inside. It would recommend a book on the inside but I never could find them anywhere. Otherwise though it was a fantastic program and did what we needed it to do!
Comment: Used 3 levels for 3 students, and they all hated this and thought it was boring. No real learning, just busy work, similar to public school worksheets, only VERY repetitive.