In the late 1980s, Kadis was appointed as co-chair to a community group called "Parents Advocating Student Success". She called for a provincial investigation into the practices of the York Board of Education and sought help from Ontario Education Minister Sean Conway. She claimed the board was anti-Semitic, based on allegations that there were a disproportionate number of students of the Jewish faith who failed a grade, including her own son. She succeeded in getting the province to investigate. As a result, the province then retested the students that had originally failed a grade.