Reinforce blends and digraphs with this unique CD Card Set that combines interactive sound, full-color images and text when used with the Radius® Audio Learning System. Set of 40 double-sided, write-on/wipe-off cards includes over 80 activities linked via custom barcode to a corresponding CD programmed to help students complete the activities and answer related questions. CD contains more than 45 minutes of audio content, including a variety of instructional activities, each of which can be completed by 1-4 students at a time. Cards measure 8.5” x 5”. Aligned with Put Reading First and Title I of No Child Left Behind.