Complex sentence: Along with classes, they often emphasize the importance of keeping healthy to their students-smoking is considered to be taboo, almost on the level of a crime, and working in the vegetable garden is compulsory.
Split into simpler sentences: Along with classes, they often emphasize the importance of keeping healthy to their students. For instance, smoking is considered to be taboo, almost on the level of a crime; working in the vegetable garden, however, is compulsory.