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 media can address teaching tasks by emphasizing learners' backgrounds. Different media types are explored including their impacts on learning, such as print increasing motivation and still graphics assisting with higher-order thinking. Video and animation are discussed as potentially enabling efficient global learning but being costly and complex to deliver. The internet is described as having large capacity but also problems like security, navigation and time consumption that must be addressed.