"Philip Adey is a professor at King’s college London. He has been engaged in the research on students’ cognitive development, and developed Cognitive Acceleration (CA) as an approach to teaching designed to develop students' thinking ability. He also developed many course materials using CA approach.Bob Kibble is a senior Lecturer in Science Education at the University of Edinburgh. He was elected Chair of the Association for Science Education of UK in 2006, Chair of the Association for Science Education of Scotland in 2004 and 2008. He has more than 22 years of teaching experience, and more than 20 years of teacher training experience."