Preface Acknowledgements Biography of Dr. Kiyonobu Itakura About the editorial committee members A Collection of Articles and Essays by Kiyonobu Itakura 1 The Process of Establishing Mental Recognition in Science 2 What is the Hypothesis–Experiment Class? History and Classroom Management 3 Hypothesis–Experiment Class as Democratic Education 4 Memorandum Regarding Hypothesis–Experiment Class First Appearances and Research History Further Reading The Kasetsu Class Album Appendices: HEC Classbooks (Jugyōsho) 1 Objects and their Weight 2 Force and Motion (1) 3 If You Could See an Atom 4 How Many Legs?