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maller library tremendously. Students using search engines can find information quicker and more tailored(adj. 特制的, 合身的) to their specific needs.As a disadvantage, educators may consider this information overload(v給…增加負擔(dān)). With all of the information available to students, they may find it difficult to choose which information is most important to a topic and also when to stop looking. In addition, the validity(有效性, 正確性) of Internet sources varies considerably from website to website, which means students can very easily acquire inaccurate or outdated information online.Online Education (托福作文中出現(xiàn)過)An online education provides students with the convenience of going to class and pleting assignments on their own timetable. Students can take classes from a college or university nowhere near their home and get an education experience not available to them locally. Students who travel with a job can take a class in a house, hotel room or coffee shop. Students save on housing, gas money and travel expenses.However, an online education means facetoface instruction does not exist, nor does the ability to get instantfeedback on class assignments in many situations. They also cant hear questions from other students (or ask questions themselves), which often can give clarification to a student struggling with the concepts of the material.Virtual Field TripsAn advantage of a classroom Internet connection allows students to take a virtual field trip without ever leaving their school building. Students studying the animals of Africa, the Great Wall of China or the Egyptian pyramids, for example, never have to get on a plane. For schools struggling with budgets and for schools in rural locations, going to an online museum or virtual zoo gives them a unique opportunity they might not otherwise have without Internet access.Disadvantages of this experience mean students cant ask questions of the zookeeper or touch a snake at a zoo. They cant take pictures or create memories with their classmates. F