| Summary: | This paper presents preliminary results from the implementation of a Potentially Meaningful Teaching Unit in four classes of third grade of secondary educational from a public school in the city of Bagé (Rio Grande do Sul). The proposed content deals with concepts related to Quantum Physics (quantization, uncertainty principle, state and superposition of states), presented in accordance with the sequence of eight steps of Potentially Meaningful Teaching Unit, seeking meaningful learning of these concepts. Are analyzed in this work mental maps and concept maps produced in pairs, as well as the comparison between them. Also presented are some comments from students about their development in the understanding of the concepts covered in the proposal. The proposal was a well received and, although the study is still in progress and part of a broader research, already provide evidence of significant learning, which is the goal of a Potentially Meaningful Teaching Unit.
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