Contributions of Curricula:
A Historical Look at How We Teach Addition
For my class project in Research in Mathematics Education, Autumn 2006, I analyzed first grade curriculum books from 1897 to 2004. Specifically, I compared their philosophies, how these textbooks taught addition, and the sequence of addition topics.
View the PowerPoint presentation: Contributions of Curricula: A Historical Look at How We Teach Addition (includes pictures).
View the paper (.pdf) describing the findings.