STATEMENT OF THE STUDY: A study to Assess the Effectiveness of Planned Teaching Program on Knowledge Regarding GCS (Glasgow Coma Scale) among Nursing Students in Selected College of Nursing at Patna. OBJECTIVE: 1.To assess the effectiveness of planned teaching program regarding GCS (Glasgow Coma Scale) among nursing students in a selected College of Nursing at Patna. 2. To assess the knowledge level regarding GCS (Glasgow Coma Scale) among nursing students in a selected College of Nursing at Patna. 3. To find out the association between pre-test & post -test knowledge regarding GCS (Glasgow Coma Scale) with their selected Socio-demographic variables. MATERIALS AND METHODS: A Non probability Convenience Sampling Technique was used for selecting a sample of 60 students. A questionnaire was made to assess the knowledge regarding Glasgow Coma Scale tool consist of socio demographic data, self- structured questionnaires. Expert opinion and content validity of the tool was established by experts. RESULTS: The pre-test and post-test level of knowledge on Glasgow Coma Scale before and after Planned Teaching Program. It shows that before the Planned Teaching Program, 16.67% of students are having average knowledge, 18.33 % of them having good knowledge, 0% having excellent knowledge & 45% having poor knowledge. After the administration of planned teaching program, 48.33% of students are having good knowledge, 35% of them having excellent knowledge, 16.67% having average knowledge & 0% having poor knowledge. CONCLUSION: Therefore, H1 and H2 hypothesis were accepted that there will be significant difference in pre-test and post-test knowledge score of nursing student after intervention of Planned Teaching Program regarding Glasgow Coma Scale which show level of post-test knowledge score is higher than level of knowledge score in pre-test.