The Grade 12 Calculus (AB/BC) rubric is designed to assess students’ mastery of key calculus concepts and their ability to apply these principles to solve complex problems. The rubric evaluates performance across multiple domains; including conceptual understanding; procedural fluency; problem-solving; and communication of mathematical reasoning. Each criterion is aligned with rigorous academic standards to ensure students develop a deep and transferable knowledge of calculus. In the conceptual understanding category; students demonstrate their grasp of foundational ideas such as limits; derivatives; integrals; and the Fundamental Theorem of Calculus. Mastery in this area ensures students can interpret and explain mathematical concepts beyond rote memorization. Procedural fluency measures the accuracy and efficiency with which students perform calculations; apply rules; and execute techniques like differentiation and integration. This skill is critical for success in advanced STEM fields. The problem-solving criterion assesses students’ ability to analyze real-world and abstract scenarios; formulate strategies; and arrive at logical solutions. This fosters critical thinking and adaptability; preparing students for college-level coursework. Finally; the communication criterion evaluates how clearly students articulate their reasoning; justify their steps; and present their work. Effective communication is essential for collaboration and professional success. By using this rubric; educators provide consistent and transparent feedback; helping students identify strengths and areas for growth. The structured assessment framework supports differentiated instruction; ensuring all learners can progress at an appropriate pace. Ultimately; this rubric prepares students for the challenges of higher education and careers in mathematics; engineering; and the sciences by cultivating analytical rigor and problem-solving proficiency.