nature of science (NOS) in curriculum development, thus, the goal of science was defined in different ways. Bybee
and DeBoer (1994) summarized the goals of science education as “1) personal and social development, 2)
knowledge of scientific facts and principles, and 3) scientific methods and skills and their applications” (p.358). In
order to achieve these aims science education should be improved in terms of a wide range of methodologies,
instructional materials and inquiry procedures (Hurd, 1970). Since according to Baez (1971), there is a relationship
between instruction methods and achievement of the aims this means that methodology is most important factor in
science teaching in achieving the aims of science education