The document discusses characteristics of 21st century learners and learning theories. It provides three key characteristics of 21st century learners: 1) They prefer active, hands-on learning and see teachers as coaches; 2) They learn content in a networked, multitasking way and through interdisciplinary projects; 3) They use and share information from multiple technology-based formats. The document then compares learning theories of behaviorism, cognitivism, and constructivism and discusses their principles, instructional processes, roles of teachers and students. Finally, it outlines eight principles of effective instruction including assessing prior knowledge, considering individual differences, stating objectives, developing metacognitive skills, providing social interaction, incorporating realistic contexts, engaging relevant