Creativity can be defined as the production of novel thoughts, solutions, or products based on previous experience and knowledge. Learning is a creative process that involves students making information relevant by linking prior knowledge and new knowledge in an individually meaningful way.
Unfortunately, most school environments do not support, and many actively suppress, creative expression because teachers are often ill equipped to develop, support, or evaluate creativity in their students. In addition, much theory and research shows that creative students often lose their creative potential.
Read this paper on creativity in the classroom, it is full of insights for effective teaching and the fostering of creativity.