The Inkling app is a full featured textbook reader for iPad. The textbooks are compatible whit iOS's VoiceOver so they can be read aloud. Inkling has a great interface with intuitive navigation. The textbooks include images. The textbooks are costly but individual chapters are sold for under $5. So if your class will only use a few chapters you only need to buy a couple chapters. The selection is not very good but is improving. The note taking feature is very simple to use. There is also an option to share your notes with friends with the same book. The books can have multimedia such as videos and audio notes. The app is free but books are not. The app's strong point is its multimedia and user interface.