Critical thinking is the first pillar of 21st century education and focuses on exploring problems from different perspectives rather than just finding answers. It is important because it encourages thinking outside the box and combining knowledge to solve problems in new ways. Technology can expand critical thinking by providing information and challenging students to think more independently by accessing knowledge from anywhere. Some examples of how to apply critical thinking in education include mystery skype games between classrooms that require students to investigate clues and find solutions without direct instructions.