Check out the Entourage Edge. It's a dual-screen e-reader; one screen is a 9.7 in. e-text display and the other is a 9.7 in. LCD display. The e-screen has a very nice highlighting/annotating system and will displays the table of content for a pdf while you're reading it on the e-screen so that you can jump around in a book or search for previously highlighted passages. Really, having the lcd screen is what sets it apart because you gain a lot in functionality over the other single-screened e-readers. Not to mention it runs on android, and has built-in usb, webcam, and microphone for other educational purposes.