There are a few ways your teaching might need to change to get the most out of these books. First, focus at least some small group reading lessons on applying phonics to read words in texts by following our templates and using Beyond Decodables. Second, change your prompting to focus on "Look at the word" and "Slide through each sound" instead of "Check the picture." Third, consider a new way of evaluating children's reading, like Drs. Nell K. Duke, Alessandra E. Ward, and Rachel Klingelhofer's Listening to Reading Protocol (available on Dr. Nell K. Duke's website)(https://www.nellkduke.org/listening-to-reading-protocol).
All of this and more in my new book, Reading Above the Fray.(https://www.amazon.com/Reading-Above-Fray-Research-Based-Developing/dp/133882872X) Find it everywhere books are sold.