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The main idea statement for this paragraph.
In education, as in other fields, new technologies tend to go through three stages of application. In the first stage, the technology is applied to things we already do. For instance, when microcomputer programs were first introduced into education, computer programs were created to simulate flashcards for math drills. As a technology moves into the second stage, it is used to improve on the tasks we do. As an example, a more sophisticated math software application can provide remedial instruction when a student makes the same mistakes more than once. In the final stage of maturity, the technology is used to do things that were not possible before. An example of technology in this stage would be a geographic information system (GIS) which can translate data to a digital map. The power of a GIS comes from its ability to display several layers of maps on a screen at one time. This kind of application enables students to pull together knowledge and skills from disciplines in a collaborative manner to solve a problem in their local communities.
What is the first sentence?