The objectives of the study were: (1) To develop suitable software on the selected topic “Electricity” for class IX and validate it. (2) To study the effect of computer assisted instruction on learning the concepts in the topic “Electricity” in physics. (3) To analyze the variation among the students in the acquisition of various cognitive skills by learning through computer assisted instruction. (4) To study the relationship between achievements in physics learnt through computer assisted instruction and intelligence of the students. (5) To find out the relation between students’ attitude towards science and their achievement in learning through computer assisted instruction.

The hypotheses of the study were: (1) There will be significant difference in the achievement between the students who learn through computer assisted instruction and through traditional method. (2) There will be significant difference in the acquisition of various cognitive skills of students learning through computer assisted instruction and through traditional method. (3) Students’ learning through computer assisted instruction and traditional method differ in their achievement in different units in the topic “Electricity”. (4) There will be significant relation between achievement of students’ learning through computer assisted instruction and their intelligence. (5) There will be significant difference between the attitude towards science that learns through computer assisted instruction and through traditional method.

Total 200 students of IX standard were selected from Kendriya vidyalaya, and Sri Padmavathy Ammal matriculation school.

Tools used were: Computer programming on the topic “Electricity” in physics for class IX prepared by the investigator; Culture Fair Test scale 2 published by institute for personality and ability testing; Science attitude scale; Interim test (unit test) on the topic to assess the terminal behaviors of the students prepared by the investigator; Achievement test in the topic to assess the cognitive abilities of the students prepared by the investigator.

The data were analyzed with the help of t-test and correlation technique.

The findings of the study were: (1) The achievement in the posttest of the experimental group is higher as compared to control group. (2) The experimental group differs significantly when compared to control group. Hence learning through computers helped in achieving better than the control group. (3) There is significant difference in the achievement of the students who learnt through computer assisted instruction that the achievement of the students learnt through traditional method. (4) The attainment of the cognitive factor “Application and skill” is lower for the students who learn through traditional method when compared to the students who learn through computer. (5) For the students’ understanding of the units nature of changes (unit 1) and electric potential (unit 2) are found to be difficult when they learn through traditional method, but it has been found that students found it easier when they learn the same concept through computer. (6) There is no significant relationship between achievements of students learning through computer assisted instruction and their intelligence. (7) There is no significant difference between the attitude towards science that learns through computer assisted instruction and through traditional method.