To create these new phonics units. Lucy and her coauthors have drawn on all that they know from decades of teaching reading and writing in thousands of classrooms across the world, and they've relied on proven, research-based practices—especially on the work of Isabel Beck, Donna Scanlon, Pat and Jim Cunningham, Rollanda O’Connor, Marilyn Adams, Tim Rasinski, Donald Bear, Wiley Blevins, and the late Marie Clay.