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2. Henning, M. B., Snow-Gerono, J. L., Reed, D., & Warner, A. (2006). Listening to children think critically about Christopher Columbus. Social Studies and Young Learners, 19(2), 19–22.
3. National Council for the Social Studies. (1994). Expectations of excellence: Curriculum standards for social studies. Washington, DC: Author.
4. Ohio Department of Education. Academic content standards: Social studies. http://www.ode.state.oh.us/GD/Templates/Pages/ODE/ODEPrimary.aspx?page=2&TopicRelationID=305
5. VanSledright, B. (2004). What does it mean to think historically… and how do you teach it? Special Education, 68, 230.