Eleanor Duckworth is a constructivist educator and a cognitive psychologist. Her main ideas of teaching learning include the ideas that the child brings in her own knowledge and experience as well as the need for a sufficiently challenging environment for the learning to happen. The teacher takes on the role of a facilitator for the learning as well the role of a researcher inquiring into the learning process. In a powerful article, she argues that the having of wonderful ideas and the asking of good questions is the key to intellectual development.
Please see the following additional links.
1. http://en.wikipedia.org/wiki/Eleanor_Duckworth Wikipedia on her.
2. http://www.criticalexplorers.org/investigations/ This is a compilation of ongoing investigative approaches to specific topics in History.
3. http://www.criticalexplorers.org/blog/categories/classroom-teaching/ - The blog linked to the above web site.