High-order thinking questions are questions that need constructing and supporting responses to interpretative, open-ended, evaluative, inquiry, inferential and synthesis questions. These type of questions involve using critical thinking and problem solving.
High-order thinking questions don't have one correct answer, and they allow for creative answers. High-order thinking is a concept based on learning Bloom's Taxonomy. Bloom's Taxonomy is a way of differentiating core questions in the education system, and it groups thinking into six levels: remembering, applying, understanding, analyzing, evaluating and creating. High-order thinking is important because the skills are accessible in complex situations, but they are hard to learn and teach.