The document provides detailed guidelines for calculating Academic Performance Indicator (API) scores for promotion of teachers under the Career Advancement Scheme, 2010. It outlines the minimum requirements of API scores in different categories for different levels of promotion. Category I covers teaching, learning and evaluation activities. Category II includes co-curricular, extension and professional development activities. Research and academic contributions are assessed under Category III. The API scores are subject to verification by screening or selection committees for approving promotions. The document also includes tables to help calculate the API scores for activities under each category.