Today, we are living in age of Science and technology. Information technology is progressively invading each and every of the modern civilization. It is a compressively umbrella term covering all the technological inventions which are used for collection, processing and transmission of information the world over. In this new technological age, the world is fully equipped with electronic devices. In 21st century, the odjectives of education will be achieved through use of technology in the filed of education. The present study highlighted the effectiveness of computer assisted instruction on the academic achievement of XI grade students.