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Aysegül Derman; Figen Gunes; Ozcan Gulacar; Ingo Eilks – Chemistry Education Research and Practice, 2024
This study aims to determine the cognitive structures of students at different educational levels (8th grade and 12th grade) related to acid-base chemistry. The research was designed as a case study and structured in two stages. The first stage analyzed concepts related to acid-base chemistry and their direction and strength in students' knowledge…
Descriptors: Chemistry, Science Instruction, Cognitive Structures, Grade 8
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Baptista, Monica; Martins, Iva; Conceiçao, Teresa; Reis, Pedro – Chemistry Education Research and Practice, 2019
The purpose of this study was to understand how the use of multiple representations (MR), during a sequence of lessons on the saponification reaction, can help students develop their cognitive structures. We examined (i) the effect of the teaching sequence with MR on the development of the students' cognitive structures and (ii) how, according to…
Descriptors: Science Instruction, Grade 12, High School Students, Chemistry
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Tan, Kim Chwee Daniel; Taber, Keith S.; Liew, Yong Qiang; Teo, Kay Liang Alan – Chemistry Education Research and Practice, 2019
The internet is prevalent in society today, and user-friendly web-based productivity tools are readily available for developing diagnostic instruments. This study sought to determine the affordances of a web-based diagnostic instrument on ionisation energy (wIEDI) based on the pen-and-paper version, the Ionisation Energy Diagnostic Instrument…
Descriptors: Energy, Secondary School Science, Chemistry, Diagnostic Tests
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Yan, Yaw Kai; Subramaniam, R. – Chemistry Education Research and Practice, 2018
This study focused on grade 12 students' understanding of reaction kinetics. A 4-tier diagnostic instrument was developed for this purpose and administered to 137 students in the main study. Findings showed that reaction kinetics is a difficult topic for these students, with a total of 25 alternative conceptions (ACs) being uncovered. Except for…
Descriptors: Diagnostic Tests, Kinetics, Grade 12, Chemistry