We Educate Students for Success in a Changing World. Today’s Students Are Tomorrow’s Future. At Archbishop International School, we strongly believe that the early childhood years (0 to 6 years) are the most critical for brain development. These formative years lay the foundation in all subjects—language, numeracy, science, social interaction, and creative thinking. That’s why we focus on building strong academic, social, emotional, and physical skills through structured and engaging learning.