Strassfeld has presented her research and worked to improve teacher education at the local, national and international level for over thirty years.
After graduating, she taught a variety of classes as an adjunct, including courses in the mathematics department, and both elementary and secondary education at Brooklyn College.
[3] In 2000, she began her job at New York University (NYU) Steinhardt School of Culture, Education and Human Development, where she remained for over a decade.
During this time, she served as director and co-director of the undergraduate and graduate level secondary mathematics education program.
[1] In 2012 and 2013 she was part of the Visiting Faculty Program Feinberg Graduate School of Education- Weizmann Institute, Israel.