By Joel LeMon's own account, he has commandeered all of Allan Paivo's works from the library, but here's a paper in which he explicitly addressed dual-coding to education and updates some of his earlier work.

An essay that considers different types of communication, esp. nonverbal and tone issues, in online educational settings.

This is a multi-authored article that appeared in the journal Teaching Theology and Religion. I participated in the composition but the reason I am posting it is not my own little section on multi-sensory imagery but rather the part by Russell Haitch which discusses long distance education in the New Testament--the Apostle Paul to be specific. Haitch (as I recall) makes a good case that examples like this one show that one really communicate effectively and passionately, from a long distance, for the purpose of educational transformation. So, if you look at this, zero in on Haitch's case study.