Investigation of high school students' conceptions and learning processes concerning the change in material properties at nanoscale

Postgraduate Thesis uoadl:1446770 642 Read counter

Unit:
Κατεύθυνση Διδακτική της Χημείας
Library of the School of Science
Deposit date:
2017-03-29
Year:
2017
Author:
Tsetseri Maria
Supervisors info:
Δημήτρης Σταύρου, Αναπληρωτής Καθηγητής, ΠΤΔΕ, Πανεπιστήμιο Κρήτης (Επιβλέπων)
Κρυσταλλία Χαλκιά, Καθηγήτρια, ΠΤΔΕ, ΕΚΠΑ
Αθανάσιος Χρυσανθόπουλος, Επίκουρος Καθηγητής, Τμήμα Χημείας, ΕΚΠΑ
Original Title:
Διερεύνηση των αντιλήψεων και διαδικασιών μάθησης μαθητών Γυμνασίου για την αλλαγή ιδιοτήτων υλικών σωμάτων σε επίπεδο Nανοκλίμακας
Languages:
Greek
Translated title:
Investigation of high school students' conceptions and learning processes concerning the change in material properties at nanoscale
Summary:
Nanoscience and nanotechnology are emerging fields in science and technology. Nanoscale is generally defined as including any material of which at least one dimension is 1 to 100 nanometers. In nanoscale, materials exhibit new and often unexpected properties. The physical and chemical properties of nanomaterials depend on the different kind of forces, on interactions between particles, on the nature of matter and on the quantization of energy states. This scientific knowledge must be integrated into Science Curriculum.
In the present work, we used the model of Educational Reconstruction, which provides a recursive procedure between: (a) Clarification and Analysis of Science Content, (b) Research on Teaching and Learning, (c) Design and Evaluation of Teaching and Learning Environments. Based on this model we investigated high school students’ conceptions concerning the change in material properties, as nanoscale is reached and the learning processes towards scientific knowledge.
Our empirical study was conducted with 8th and 9th grade students following two axes. At the beginning we developed and analyzed an introductory questionnaire aiming at identification of students conceptions involving material properties and conditions under which properties change. The main part of our empirical study was based on a Teaching Experiment, which aimed at the development of a teaching sequence in studying material properties in nanoscale and at investigating students’ learning processes.
Analyzing the results of our study we conclude the following: Students identify size as a parameter influencing material properties. As the Teaching Experiment completed, students were capable of describing and justifying the emerging properties in nanoscale, connecting different behavior to different kinds of forces and their different domination over different scales.
Main subject category:
Science
Keywords:
Model of Educational Reconstruction, Teaching Experiment, material properties, nanoscale
Index:
Yes
Number of index pages:
3
Contains images:
Yes
Number of references:
65
Number of pages:
140
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