Challenges (related to the model of students, teachers, institutions, language, culture etc.) of teaching and learning include cognitive issues, thus being related to students and teachers. In addition, however, there is content and especially context: technology, temperature, size of the class, quality of the air as well as time. Learning and teaching do not occur in laboratory conditions but among individuals typically in a certain in space and time. For example, a typical nuisance is the when computers broke down (with lags/bugs). In different situations (business, TV, lecture, computer class) and different cultures the failure in technology, for example, may be seen more as the failure of the teacher and the pedagogy than in other cultures and situations. A back-up plan of what to do if everything seems to fall apart may be a good thing to have in a teacher’s “pedagogic toolbox”.