My scientific activities focused on all aspects of the curriculum process, ie; Curriculum development, implementation, professional development of teachers, evaluation, and research. These procedures were carried out within the framework of chemical education programs as well as the "science for all" program in Israel over the period of almost 50 years. The work on these programs was conducted in collaboration with  various members of the chemistry group , graduate students and many chemistry teachers and science educators around the world (USA, Australia, Germany, and the UK).