This study followed a five-year program, entitled "Senso-Math", whose goal was to train facilitators involved in the promotion of early childhood mathematical knowledge in preschool-an important goal in preschool education today-following which the trained facilitators taught mathematics in preschool alongside the regular preschool teachers. During the program, 500 facilitators activated 10,000 three-to-six-year-old children. The program included various demographic sectors. This study examines both the program's contribution to the professional development of the mathematical education facilitators, and the facilitators' attitudes to mathematical education in the preschool. While the results indicated that, overall, the program contributed positively to the facilitators' professional development and showed a positive trend in the participants' attitude regarding mathematics education in the preschool, the findings also revealed differences among the various demographic sectors studied (Jewish Orthodox, Jewish immigrants from the Caucasus, and Druze).