As I was traveling to Macworld 2013, where I presented a session on iBooks Author, I had some time when I was trapped on a plane without Wi-Fi (the horror!). Rather than reading the magazine in front of me, I gave into my urge to try to combine two frameworks I am really passionate about, the SAMR model developed by Dr. Ruben Puentadura and the UDL framework developed by CAST. Below is an image showing the framework I developed and some apps that address each level. This was just a quick brainstorm on a long plane ride, but I do appreciate your feedback.
Update: Here is a text version that should be more accessible with a screen reader (with app and feature matching):
n: needs assessment and profile
determine current level of performance and desired outcomes.
A: access to content and tools
The technology eliminates barriers that prevent access to information
- Proloquo2Go
- FaceTime
- VoiceOver
- AssistiveTouch
- Closed Captioning Support
- Dictation (built-in with iOS)
- Dragon Dictation
The technology includes scaffolds and supports that account for learner differences.
- iBooks
- AppWriter US
- Speak It!
- Typ-O HD
- Evernote
- Notability
- Book Creator
- Creative Book Builder
- StoryKit
- SonicPics
- StoryRobe
- Pictello
The technology unleashes creative potential and disrupts perceptions of disability.
- Camera
- iMovie
- Garageband
- iPhoto
The Website of Luis Perez 
My only comment is that “Mask with a shape> Rounded Rectangle” will give you a cleaner look than “Instant Alpha” with those apps. Great slides!
^_^