The document traces the history and development of educational technology from the 18th century to the present. It discusses how early public schools adopted teacher-led instruction models and how radio, film, and television were later incorporated into classrooms. Personal computers were introduced in schools in the 1980s and internet access expanded in the 1990s, allowing for more student-centered learning. Today, technologies like interactive whiteboards and laptops are commonly used as instructional tools to engage students and support different learning styles.