1. Asking Questions to Trigger Thinking;Ashner;NEA Journal,September 1961
2. Cognitive Objectives Revealed by Classroom Questions Asked by Social Studies Student Teachers;Davis;Peabody Journal of Education,July 1967
3. Expressive Thought by Gifted Children in the Classroom;Gallagher;Elementary English,May 1965
4. Rogers , Virginia M. Varying the Cognitive Levels of Classroom Questions in Elementary Social Studies: An Analysis of the Use of Questions by Student Teachers 1969