Background: Microorganisms are very important in day-to-day life, but they are inadequately addressed in the Spanish educational system. It is essential that students are well informed about their characteristics and functions. Purpose: The study aims to find out primary school students' perceptions of microorganisms and to analyze whether…

Reform documents have provided a framework for advancing science education (e.g., The Australian National Science Standard Committee, 2002), but omit the need to assess preservice teachers prior knowledge for designing effective learning programs. A pretest-posttest 34-item survey linked to the course outcomes (associated with four constructs)…