Final answer:
Technological advancements, economic shifts, and cultural transformations are factors that have contributed to changes in the structure of secondary schools, aligning with societal revolutions. However, educational inequality is an ongoing issue and not a factor driving these changes.
Step-by-step explanation:
Changes in the structure of secondary schools have been linked to broader societal revolutions, including technological advancements, economic shifts, and cultural transformations. These factors have driven changes within educational systems as part of larger social changes. Technological advancements, for example, have altered teaching methods and educational resources, whereas economic shifts can change the focus of educational systems to prepare students for current job markets. Cultural transformations influence the values and expectations placed on education. However, c) educational inequality is a persisting issue within education systems rather than a contributing factor to the changes in the structure of secondary schools as it indicates disparities that exist regardless of changes.