Research this time to 1) to develop computer-assisted lessons teach Internet and applications for high school students in the second year of performance criteria. 2.2), 80/80 to compare achievement before and after learning the computer class student 2nd year high school that is taught by using a computer-assisted lessons teach. 3.3), to study the satisfaction of students towards the use of computer-assisted teaching lessons.The tools that are used in research, there is 1 2) computer-assisted lessons teach Internet usage and efficiency. 80.67/81.33 2) test, which is an achievement test, four 30-type style from multiple choice selections with a straight linear content. The difficulty value is included between 0.35 – 0.65 there is value is between 0.20 0.40 – resolution authority and is equal to the precision value is 0.79. The sample in this research include high school students, the year that the school winit rat 2/1, the number of people is 35 high school group, for example, which is derived from a specific Coop.
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