1. A taxonomy for learning, teaching, and assessing: a revision of Bloom's taxonomy of educational objectives, abridged edition,2001
2. Taxonomy of educational objectives, handbook I: The cognitive domain,1956
3. How to assess higher-order thinking skills in your classroom;Brookhart,2010
4. Teaching HOTS in the middle and high school: A district-Level initiative in developing higher order thinking skills;Crump;Roeper Review,1988
5. Current developments in problem based learning within the Hong Kong Institute of Education;Forrester,1999