| Yazarlar |
Prof. Dr. Tezcan KARTAL
Kırşehir Ahi Evran Üniversitesi, Türkiye |
Doç. Dr. Büşra KARTAL
Kırşehir Ahi Evran Üniversitesi, Türkiye |
| Özet |
| Stoichiometry problems are one of the best examples of problem solving in chemistry education.Proportionalreasoningsupportscorrectanswersinstoichiometry problems. It is needed to examine how these problems are solved as well as the accuracy of solutions because of the importance and benefits of conceptual problem solving.Thisstudyutilizestheembeddedmultiplecasestudydesign.The stoichiometryproblemsolutionsof37pre-servicescienceteachers(PSTs)were examined based on three units of analysis; (i) whether pre-service teachers balanced the equations correctly or not, (ii) the accuracy of solutions, and (iii) strategies used to solve problems. More than half of the PSTs balanced the equations correctly but most of them did not interpret the integers in the equations appropriately. Participants were inclined to use algorithmic approach more than proportional reasoning. The accuracy of solutions and the frequency of algorithmic approach increased while the complexity of problems decreased. PSTs had difficulties in making sense of integers of chemical reactions, using intensive units such as density, and converting units. It is thought that PSTs prefer to use strategies that they learnt in their prior learning experiences. Within the context of findings, we suggest that PSTs should be supported conceptuallyaboutthemeaningsofintegersandshouldbeintroducedusing proportional reasoning in problem solving prior to algorithms. |
| Anahtar Kelimeler |
| Stoichiometry problems | proportional reasoning | pre-service science teachers |
| Makale Türü | Özgün Makale |
| Makale Alt Türü | ESCI dergilerinde yayımlanan tam makale |
| Dergi Adı | CUKUROVA UNIVERSITY FACULTY OF EDUCATION JOURNAL |
| Dergi ISSN | 1302-9967 |
| Dergi Tarandığı Indeksler | ESCI |
| Makale Dili | İngilizce |
| Basım Tarihi | 04-2019 |
| Cilt No | 48 |
| Sayı | 1 |
| Sayfalar | 910 / 944 |
| Doi Numarası | 10.14812/cufej.491826 |
| Makale Linki | chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://dergipark.org.tr/en/download/article-file/704116 |
| Atıf Sayıları | |
| WoS | 2 |
| TRDizin | 1 |
| Google Scholar | 8 |
