Teacher agency within the International Baccalaureate (IB) framework empowers educators to take ownership of their instructional practices and contribute meaningfully to the learning environment. This autonomy allows IB teachers to adapt the curriculum to meet the unique needs of their students, integrate innovative teaching strategies, and foster a classroom culture that aligns with IB's principles of inquiry and global understanding. By exercising their professional judgment and creativity, teachers not only enhance their own teaching experiences but also inspire and engage students in deeper, more personalized learning. Teacher agency is crucial for cultivating a dynamic and responsive educational setting where both educators and students thrive.