Aps-ajp-11-1001-Book indb
Evidence of learning physics processes
Download 231.88 Kb. Pdf ko'rish
|
6404f97bd5c2c-teacher-education-in-physics
2. Evidence of learning physics processes
Progress in the understanding of the processes of science is achieved similar to the understanding of the content. Below I describe a part of the study done in the fall of 2003 with the students in the “Development of Ideas in Physical Science.” There were ten students in the course working on their MS in Science Education+teacher certifi- cation in physics or chemistry. The part of the study de- scribed here investigated the following question: Could the students differentiate between different scientific process el- ements such as observational experiments, explanations, pre- dictions, and testing experiments, and follow the logic of hypotheticodeductive reasoning while reading the book “Physics, the Human Adventure” 关 49 兴 and reflecting on the classroom experiences? To answer this question, first submissions of each weekly report were coded with five categories for the instances when students demonstrated: 共a兲 an ability to differentiate between observations and explanations; 共b兲 an ability to differentiate between explanations and predictions; 共c兲 an ability to differ- entiate between observational and testing experiments; 共d兲 an ability to relate the testing experiment to the prediction; and 共e兲 explicit hypothetical-deductive reasoning 共if the hypoth- esis is correct, and we do such and such, then such and such should happen, but it did not happen therefore we need to revise the hypothesis, examine assumptions, collect more data, etc. 兲. An explanation was a statement related to the patterns in the observed phenomenon, while the prediction involved using an explanation to predict the outcome of a testing experiment. Instances where students confused ele- EUGENIA ETKINA PHYS. REV. ST PHYS. EDUC. RES. 6, 020110 共2010兲 020110-18 Teacher Education in Physics 120 ments in codes 共a兲–共d兲 were coded as well. Examples of the statements coded for understanding or confusion for the above categories are shown in Appendix C. Two raters discussed the codes, then coded student work for one assignment separately, and then discussed the coding again. When their agreement reached 100% after the discus- sion, they proceeded scoring the rest of the assignments. The agreement for those without the discussion was around 80%. The results of the coding indicated that, in assignment no. 1, 9 out of 10 students confused observations with explana- tions; only one did not make this mistake. By assignment no. 8, none of the students made a mistake confusing an obser- vation with an explanation. Differentiating between explanations and predictions turned out to be a more difficult task. During the first assign- ment, only two students attempted to write about predictions and both of them confused these with explanations. In the second week, nine students used these elements and three were successful. The trend continued: in assignment no. 6 of the course, every student was writing about explanations and predictions and 8 out of 10 correctly differentiated between them in most cases. Sometimes, on the same assignment, a student would distinguish between explanations and predic- tions for one idea and then confuse them for another idea. Relating predictions to testing experiments was another challenge. During the second week, only two students de- scribed what predictions scientists made before performing Download 231.88 Kb. Do'stlaringiz bilan baham: |
Ma'lumotlar bazasi mualliflik huquqi bilan himoyalangan ©fayllar.org 2024
ma'muriyatiga murojaat qiling
ma'muriyatiga murojaat qiling