E-books should never cost more than their print counterparts
Russ Grandinetti, the vice president of Kindle content for Amazon, suggested that the publishers should lower their e-book prices in response to consumer complaints.
“Setting a price for a Kindle book that is higher than its print counterpart makes no sense,” Mr. Grandinetti said in a statement, although it was not clear who was the chicken and who the egg in this instance. “It’s bad for readers and authors, and is illogical given the cost savings of digital. We’ve seen publishers do this in a few cases, and we’ve been urging them to stop.”
Unless they're somehow ADDING value (e.g., multimedia) to the regular text...
I do agree, though, that multimedia could increase the value of the material. You can show kids how to multiply a million times in class, but sometimes an embedded video with another instructor (doing the exact same thing) is all it takes for everyone to understand.