Dr. Roy van den Brink-Budgen has been working in the area of critical thinking (CT) since 1987. During this time, he developed the first UK assessment of critical thinking (as an A-level) and was the first Chief Examiner. He has worked with thousands of teachers in various countries in the world (including France, Spain, India, Lebanon, Malaysia, New Zealand, Singapore, and the UK), training them in the incorporation of CT into their curricula, and also working with their students. Since 2010, he has been a consultant in CT to the Principals Academy in Singapore, delivering training to teachers and producing resources designed to develop CT skills with students from kindergarten onwards. In 2023, he was appointed as Expert Consultant in CT by a large group of schools in India. He has written many books on CT for both students and teachers, has written many articles on the subject, and has delivered presentations to a large number of international conferences (including the International Conference on Thinking [ICOT]). He has recently been a series editor for a large programme of resources on primary science, using CT as a framework for the delivery of the content.