The multidisciplinary approach to the study of metals which we are proposing includes the modernization of the curricular content and its connection with everyday life. The use of additional teaching material in elementary schools in rural and urban areas in the wider region of the city of Niš has contributed to increased interest and activities on the part of the schoolchildren, which has in turn led to a significant quantitative improvement in their knowledge of chemistry in general, but also of metals in particular. All of the schoolchildren achieved a satisfactory level of knowledge (>50%) following the implementation of the expanded curriculum.
A lesson on proteins, which consists of three parts : proteins, enzymes and amino acids, was taught in the traditional way (dominant one) and using the interactive-cooperative approach. Comparative analysis of the statistical results for the experimental and control groups was carried out. The results obtained by the use of the interactive-cooperative method show overall improvement. The effect after teaching the lesson on proteins using the interactive approach shows an increase from 50% up to 71%, which points to a significant improvement and higher achievements by the students. The improvement is also represented in higher average grades of the experimental group.
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