As school children we learn in a different way, in classrooms, and the learning is guided by a teacher. We are distanced from the subjects we learn, apart from creative studies which still rely on the inner resources of the students.eg. painting and drawing, music studies etc.
For adults, I believe that learning should be centred on the students perspective of the world - ie. be student-centered and go back to the basics of seeing first, then hearing! and I use skype because I can be seen speaking the English Language, the listening is more difficult for the student, but becomes easier as their vocabulary expands.
The touching and tasting would start when a student visits an english speaking country :)