In addition to bringing the world to the classroom by inviting visitors, teachers can do the converse, they can take the classroom to the world by leading students on field trips. Such trips are not confined to any particular grade level. In the early grades of elementary school, for example, one common goal of the curriculum is to learn about community helpers the police, firefighters, store owners, and others who make a community safe and livable. As indicated already, representatives of these groups can visit the class and tell about their work. But the class can also visit the places which these people tell about: a police station, a fire hall, a local retail store, and the like. Such trips offer a more complete picture of the context in which community professionals work than is possible simply from hearing and reading about it. The benefits are possible for older students as well. In learning about water-borne diseases as part of a biology class, for example, one middle-school class took a field trip to the local water-treatment facility, where staff members explained where the town's water came from and how the water was cleaned to become drinkable at any tap.
From a teacher's point of view, of course, there are certain risks about arranging classroom visitors or field trips. One is that a visitor may turn out not to communicate well with children or young people he or she may assume too much prior knowledge, for example, or veer off the chosen topic. Another problem is that field trips often require additional funds (for admission fees or to pay for a bus), and require support from additional adults often parents to supervise students outside of school. Some of these problems are by-passed by arranging “virtual” field trips and hearing from “virtual” visitors: using computer software or media to show students places and activities which they cannot visit in person (Clark, 2006). Generally, though, a computer-based experience cannot compare with a real trip or visitor in vividness, and the benefits of actual, in-person field trips or visitors often therefore outweigh the challenges of arranging them.
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