Instructional technology uses research on learning, the brain, and available resources to solve problems in educational settings. Common methods include the ADDIE model of analyze, design, develop, implement, and evaluate; networking to increase collaboration; and e-learning using the internet for distance learning. Instructional methods deliver lessons through independent study, jigsaw activities, and project-based learning. Instructional media includes computers, websites, and software to prepare students for 21st century skills, though printed text and discussions boards are also used in e-learning environments. Performance technology tools like interactive modules, simulators, and writing programs help students practice skills with feedback.