About HEYDAY LEGACY DEMONSTRATION SCHOOLS Heyday Legacy Demonstration School, formerly known as Mater Dei Model Schools, has been a pillar of educational excellence in Lagos since 2006. As a Lagos State-approved institution, we've been nurturing young minds and shaping future leaders for over 15 years. Our institution has a rich history of providing quality education in Lagos. The transition to Heyday Legacy Demonstration School marks our commitment to building on this legacy while embracing modern educational practices and values.