Save time AND money with this all-in-one online companion to �D�MELO T�! With iLrn:' Heinle Learning Center, everything you need to master the skills and contents of the course is built right in this dynamic audio- and video-enhanced learning environment, including an interactive diagnostic study tool that helps you prepare for exams, an online workbook and lab manual with audio that allows you to receive immediate feedback on your work, and access to an audio- and video-enhanced eBook, integrated textbook activities, partnered, voice-recorded activities, and companion videos with pre- and post-viewing activities.