The Pedagogical Framework for Mobile Learning by Yeonjeong Park

Yeonjeong Park was a research for the Virginia Tech, USA, when she developed this framework. This model is appropriate to design training for distance learning, but in different perspectives with mobile devices it’s possible to use this model.
Park (2011) revisited different theories as Transactional Distance and the Active Theory. When she explored the Transactional Distance, three factors are presented: the program’s structure, the dialogue that the teacher and learners exchange in and the learners’ autonomy. The Active Theory is explored when the researcher presents the mediation between teacher and learners, learners and learners, and teacher, learners and mobile devices.
The research describes that it is essential to think  about the use of portable devices and contexts when designing mobile learning. The pedagogical framework was developed with for types of Mobile Learning:

(1) High Transactional Distance and Socialized Mobile Learning Activity (HS)
(2) High Transactional Distance and Individualized Mobile Learning Activity (HI)
(3) Low Transactional and Socialized Mobile Learning Activity (LS)
(4) Low Transactional Distance and Individualized Mobile Learning Activity (LI)

You will found more information on Website.