The innovative Radius™ Audio Learning System incorporates the benefits of an interactive CD with advanced card reading capabilities to create a whole new teaching platform! But using Radius™ Card Sets and their content-rich CDs, students now have the capability to learn a diverse number of subjects through varied lesson patterns and engaging, but simple, hands-on interaction. Simply load one of the CDs into Radius™ and slide a corresponding card into the reader slot. Students are guided through multiple levels of learning via step-by-step instructions. The colorful, double-sided cards provide a vast array of activities that are sure to engage and amaze learners of all ages. Radius™ CDs provide a much greater capacity for content than other card-based systems and an interactive, audio recording feature allows students to immediately hear up to two minutes of their responses at the touch of a button. The large LCD screen provides visual reinforcement. Designed for individual learning or groups of up to four students, Radius™ Audio Learning System covers an expansive range of subjects that will enhance and extend learning in any classroom.