The document discusses media characteristics and online learning technology. It analyzes the requirements of teaching tasks such as organization, sequencing, instruction and feedback. It discusses constructivism and how constructivist teaching emphasizes the learners' background. Different media types are explored including their impacts on learning, such as print increasing motivation and still graphics assisting with higher-order thinking. Challenges of different media like bandwidth limitations for video and the need to address problems of using the internet like security and navigation are also summarized.