Academic performance has a greater influence on many aspects in a child’s life. Academic achievement has a greater influence on self-esteem, motivation and perseverance among students. Academic performance assesses the thinking, absorbing and information processing of students. Experts in the field of education system have consistently tried to make it a better place for learning. Research works in the field is running parallel in implementing new ideas to have an effective learning practice. The present study focused on developing intervention model using character strengths from Positive Psychology to identify the effectiveness of intervention model on overall academic performance and performance in English and Maths among middle school children. Pre-Post analysis was executed on the control and the experimental group. Results show that there is significant difference in the Effectiveness of Character Strength Intervention Model on the overall academic performance and performance in English and Maths among middle school children.