Abstract
The quantitative study focused on comparative analysis of middle school mathematics teachers’
content knowledge in two countries. The sample consisted of lower secondary mathematics teachers
from the US (grades 6-9, N=102) and Russia (grades 5-9, N=97). The instrument was designed
to assess teacher content knowledge based on the cognitive domains of knowing, applying, and
reasoning, as well as addressing the lower secondary mathematics topics of Number, Algebra,
Geometry, Data and Chance. The results suggest that there are significant differences in teacher
knowledge between the countries in content as well as in cognitive domains. The study results may
inform the field on priorities placed on lower secondary mathematics teachers’ knowledge in USA
and Russia.