This is the most common and easiest form of paragraph development: you simply expand on a general topic sentence using specific examples or illustrations. Look at the following paragraph (you may have encountered it before):

Work tends to be associated with non-work-specific environments, activities, and schedules. If asked what space is reserved for learning, many students would suggest the classroom, the lab or the library. What about the kitchen? The bedroom? In fact, any room in which a student habitually studies becomes a learning space, or a place associated with thinking. Some people need to engage in sports or other physical activity before they can work successfully. Being sedentary seems to inspire others. Although most classes are scheduled between 8:30 and 22:00, some students do their best work before the sun rises, some after it sets. Some need a less flexible schedule than others, while a very few can sit and not rise until their task is completed. Some students work quickly and efficiently, while others cannot produce anything without much dust and heat.

The topic sentence makes a general claim: that school work tends not to be associated only with school. The rest of the sentences provide various illustrations of this argument. They are organised around the three categories, "environment, activities, and schedules," enumerated in the topic sentence. The details provide the concrete examples which your reader will use to evaluate the credibility of your topic sentence.