As is apparent from this brief review, there is a wide variety of instructional methods and strategies used in the teaching and learning of science that range from those that are more teacher-centered to those that are more student-centered. Each of the six methods and strategies has a growing body of theory to support each instructional approach, and enough research has been conducted with each of these different methods and strategies to have some confidence in their effectiveness in enhancing the learning, and opportunities for learning, of students from elementary school to university. None of the approaches by themselves should be seen as a panacea that will improve science learning but each method or strategy can be part l repertoire. of a successful science teacher's instructional repertoire