This book is centered on a critical thinking development in the learning by cooperation context. The experiment involved a population segment aged between 9-13 years old. This study focuses on the use of critical thinking and cooperative learning strategies, on establishing each student own tempo of learning and on reflection. The study's practical approach was built around three coordinates: thinking, writing and reflection. Problem solving represents an important element in forming the critical thinking and in fixing the social behavior; a capable student to sustain his own point of view in...