The objectives of the study were: (1) To develop CAI package in subject of chemistry for standard XI science students studying GSTB syllabus. (2) To study the effectiveness of the software package in terms of instructional time and achievement of student. (3) To study the effect of the software package on students’ achievement in relation to students’ (a) intelligence level, (b) motivations level, and (c) attitude towards the package. (4) To study the attitude of the students and teachers regarding the effectiveness of the CAI package with regard to aspects of the software, such as, content of the software, presentation of the software, examples and illustrations, graphs and figures, evaluation items, utility at the software and instructions given in the instructional manual that are provided with the software.

The three chapters were selected based on difficulty level. The sample consisted of 60 students selected randomly. Out 60 students, 30 students were in experimental group and 30 students in control group.

Tools constructed and implemented for the pilot study were the pre-test, post-test, unstructured interview schedule and structured interview schedule for chemistry teacher of standard XI.

Data were analyzed with the help of ANOVA, ANCOVA, content analysis and percentages.

The findings of the study were: (1) The software package developed for teaching three units of standard XI chemistry textbook of GSTB was effective in terms of student’s achievement and time. (2) The experimental group took 45 hours time on an average to complete the three units. (3) The academic achievement in chemistry of students of experimental group was found to be affected by variables like IQ, academic motivation and attitudes. (4) Majority of experimental group students had positive attitude about various aspects of software package especially regarding presentation of content, logical sequencing and language used for understanding the content. The school subject teachers always held the positive attitude.