Most classroom teachers teach by using the same modality with which they learn best. Those who learn aurally (by hearing things articulated verbally) tend to lecture; those who are visual learners tend to do PowerPoint presentations or use lots of pictures; those who are kinesthetic learners (by movement and physical contact) tend to assign hands-on projects; etc. Generally, this holds true even if the majority of their students learn best through different modalities than the teachers do.
Those who are the best teachers (who can reach the most students in a way that those students will understand) are those who understand the dominant modality of each student and find a way to present the instructional material in ways that allow all the dominant modalities to be employed. That's a very difficult thing to do, so there are students who end up in most classrooms not understanding what the teacher is trying to teach.
I personally think this happens in religion just as much as in the academic classroom, if not more so - since people tend to imbue their religious learning modalities with divine approbation and assume all will experience God (or not experience God) in the same way they do. I see this all the time around the Bloggernacle - people talking past each other to a large degree, often because their own manners of experiencing the divine simply are different.