Diagnosing pre-service science teachers' understanding of chemistry concepts by using computer-mediated predict-observe-explain tasks


Sesen B.

CHEMISTRY EDUCATION RESEARCH AND PRACTICE, cilt.14, ss.239-246, 2013 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 14 Konu: 3
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1039/c3rp20143k
  • Dergi Adı: CHEMISTRY EDUCATION RESEARCH AND PRACTICE
  • Sayfa Sayısı: ss.239-246

Özet

The purpose of this study was to investigate pre-service science teachers' understanding of surface tension, cohesion and adhesion forces by using computer-mediated predict-observe-explain tasks. 22 third-year pre-service science teachers participated in this study. Three computer-mediated predicto-bserve-explain tasks were developed and applied to collect data. In the first stage of each task, pre-service science teachers were required to watch video related to the aforementioned concepts. They were asked to write their predictions individually, and to justify or give a reason for their predictions. In the second stage, pre-service science teachers were required to watch the continued video carefully. They recorded their observations individually. In the last stage, the pre-service science teachers were required to reconcile any conflict between their own predictions and observations. Their written responses were analysed to investigate their understanding. Results indicated that pre-service science teachers had difficulties related to surface tension, cohesion and adhesion forces. The obtained results underlined that the computer-mediated predict-observe-explain task was an effective method to diagnose students' understanding.