After finishing her PhD she was hired as a half time, non-
tenured track, position. In 1970 the University created part-time tenured-track positions and Fennema obtained one of the positions. Fennema and
Julia Sherman applied for a grant from the
National Science Foundation (NSF)
research grant to examine factors in mathematics classroom that might be associated with
gender, resulting in the "
Fennema-Sherman studies". Fennema and her associates have spent over 25 years researching interactions of girls and young women in mathematics classrooms. One outgrowth of this was a questionnaire, the "
Fennema-Sherman Scales" to enable researchers to gather data on the attitudes of young women towards mathematics, and the results from different sites compared. She and her colleagues have also developed an innovative method of teaching mathematics called
Cognitively Guided Instruction. The Cognitively Guided Instruction (CGI) philosophy is detailed in ''Children's Mathematics'' which she co-authored with Thomas Carpenter,
Megan Loef Franke, Linda Levi, and
Susan Empson. She retired from the University of Wisconsin at the end of the 1995–1996 academic year. ==Awards==