In this study the researcher attempted to find out the effectiveness of a multimedia package in Chemistry for enhancing the achievement. The main objectives of the study were (i) (to test the effectiveness of a developed teacher assisted multimedia package in Chemistry among ninth standard students (ii) to test effectiveness of the multimedia package in Chemistry based on sub sample medium of instruction. The method adopted was experimental, a pre-test, post-test and a delayed post-test were included. The total sample consists of 160 students; the tools used were (i) Multimedia package for experimental group (ii) achievement test on the selected topics developed by the investigator and socio-economic status scale (for sub sample). The major findings of the study were (i) the multimedia package was very effective in both post-test and delayed post-test when compared to the control group (ii) there exist significant difference in the post test and delayed post-test achievement score based on medium of instruction as sub-sample.

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Keywords: Multimedia Package, Activity-Oriented Method, TAM, Post-Test Scores, TMPG.