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.

2. Educational Technology Time Line 1780 1920 Early public schools adopt the teacher/manager model with the teacher as the primary manger of instruction and assessment in a single classroom . In 1920 the Radio Division of the U.S. Department of Commerce began to license commercial and educational stations. Soon schools, colleges, departments of education, and commercial stations were providing radio programming to schools. 1890 The School slate and the chalkboard.

3. Educational Technology Time Line 1950 Language-lab headsets: Schools began to install cubicles arm s with language-lab headsets and audio tapes. Educational television: By the 1958´s there channels that included educational programming on the air. 1930 Used for the U.S military to train forces in World War I, The overhead projector eventually spread to school .

8. Technology in the classroom today