Arthur L. Costa is a professor of education at California State University, Sacramento, USA. He was a teacher, curriculum consultant and the director of educational programs for the National Aeronautics and Space Administration. Costa has spent his career improving education by developing the teaching of thinking. He states that 21st century learning is about the process, not content. In other words: ‘We must finally admit that process is the content. If we want learners to develop certain behavioural characteristics, taking a critical stance with their work, inquiring, thinking flexibly, learning from another person’s perspective, then we should start with these attributes and focus the entire curriculum on achieving them. The core of our curriculum must focus on such processes as learning to learn, knowledge production, meta-cognition, transference, decision-making, creativity and group problem solving. These are the subject matters of instruction.’ Art Costa – Developing Minds (Author of ‘Habits of Mind.)