Each CD provides 50 reading passages, which come with 100 interactive drag-and-drop activities. Reinforce learning in comprehension, vocabulary, story maps and more. Essential standards-based activities come in three formats: matching, sorting and sequencing. Activities are self-correcting, providing immediate feedback to the student. Ideal for learning centers and individual computers as well as whiteboards. Developed to work on most interactive whiteboards, including, but not limited to, SMART, Promethean, Mimio, Starboard and Hitachi. Operating System Compatibility: Windows 2000, XP, Vista, MAC-G3;Macintosh OSX (10.2+); Software Compatibility: Flash Player 9;Java 1.4; Format: CD Rom.