Developing a Model of Factors Influencing Translation Performance
Chemical processes can largely be explained at the molecular level only and are therefore not directly observable. Consequently, external representations are essential to describe and explain phenomena, contexts and processes, and to make them available for a scientific discourse. For chemistry, symbolic and particulate representations of chemical facts are the predominant forms of representation when it comes to the exploring or communication of content. In addition, with the increasing technical possibilities, three-dimensional representations - static and animated - are also increasing in addition to two-dimensional representations. This makes it all more important that students are able to switch between different forms of representation. This ability of translation, i. e. the ability to translate different external representations into each other, is crucial for the development of a basic understanding of chemical phenomena and contexts.
At the same time, this ability seems to play an important role in solving problems and is based, among other things, on cognitive flexibility, i. e. the ability to select a suitable representation for the situation in question. Cognitive flexibility is complicated by functional fixation, i. e. the sole assignment of one or very few characteristics or situations to an entity. Thus the representations remain isolated and only applicable to the respective situation. An application in a different situation than the original one is very rarely observed in class, and the factors that determine translation in detail have hardly been investigated to date.
This research project investigates quantitatively for secondary level II which cognitive factors are related to students' ability to translate and to what extent structural characteristics of representations determine the inter- and intra-representative translation distance.
A phenomenographic research on generating hypothesis
Perceiving and processing real-world information always takes place against a background of existing or acquired internal cognitive structures. These so-called "mental models" form the core insights into the understanding of processes and are the starting point for coping with problem situations. The project investigates by a qualitative experiment the structure of a situational mental model. For this purpose, chemical problems were presented as interactive videos to 18 upper secondary school students from three different grammar schools in Berlin. Each video shows a chemical phenomenon, and, in addition, chemical content knowledge as well as particulate and iconic representations to enable the understanding of the problem situation.
Based on a given question, the students were asked to prepare a concept map based and to generate a hypothesis. The concept map had two functions here. On the one hand, it should help students to visualize the problem and thus facilitate the generation of a hypothesis; on the other hand, the concept map serves to characterize the situational mental model. Subsequently, the students were asked about their individual approach by means of a guided interview. The evaluation of the data is carried out in a mixed methods approach, in which a quantitative analysis is carried out in addition to a qualitative content analysis. Furthermore, a detailed questionnaire on co-variables was collected, allowing for a person-specific analysis of the data.
The goal is to characterize a "Situational mental Modeling Building Approach" (SIMBA), which postulates a structure driven from theory and allows its externalisation of the students cognitive system to be traced to a possible internal structure. Thus, targeted and supportive learning environments, facilitating the understanding of the problem situation, could be created in future.
supported by "ProLEA" of Humboldt-University
Digital Tools for Chemistry Education in Higher Education
The demands on future chemistry teachers are becoming increasingly challenging, as the competences and skills of abstractness and complexity to be imparted to students at schools also increase (see 21st Century Skills). At the same time, however, the possibilities for shaping university teaching are also increasing in order to organize university teaching in a modern way and according to the latest findings of research on teaching and learning.
Based on a flipped-claasroom approach, the research project will conceive digital environments for teacher students of chemistry (BA), which, for example, contain video excerpts from real teaching situations to illustrate educational problem situations, or which contain explanatory videos to illustrate and summarize science education teaching approaches. Various tools for cooperative collaboration complement the environments, which on the one hand are developed for the introduction to Chemistry Education. On the other hand, in cooperation with the project "Gendering MiNT digital - Open-Science aktiv gestalten" (Prof. Dr. Sigrid Schmitz, HUBerlin) from the Federal Ministry of Education and Research (BMBF), a deepening of the topic "Nature of Science" will take place.
A model fo inclusive chemistry teaching
The acquisition of scientific knowledge through problem solving offers the possibility to consider different requirements of an inclusive chemistry lesson. The research project is explicitly based on the original, broader concept of inclusion. The theoretical model derived from the theory takes into account a differentiation both, for lower achievers and for higher performers and, in addition to domain-specific characteristics, also takes up general criteria for teaching that is perceived as good. The architecture of the "model for inclusive chemistry teaching" (MiC) is designed in particular in such a way that teachers can derive concrete, planning-guiding assistance for teaching from it.
In order to test these two aspects, the "broad" inclusion and the instruction for teachers in everyday school life, an exemplary teaching unit will be designed and quantitatively tested with approx. 10 classes of the secondary level I. The teaching unit will be designed in accordance with the following guidelines. Among other aspects, situational questionnaires are used to record the perceived fit of the teaching offer with the individual performance of the individual pupils, supplemented by guideline-based interviews with teachers.
Fostering a 21st century skill in a graduated lab work course
Critical thinking is actively reflecting upon one’s own experience and knowledge and searching for necessary information in the process of inquiry. Shifting science teaching from the rote-passive-learning to using critical thinking skills as a primary component in facilitating learning, is necessary for inquiry-based learning and for making reasoned argumentation in science. This study focuses on a physical chemistry undergraduate lab course and aimes at examining whether cognitive prompts in the context of CT enhance students’ CT-skills and CT-dispositions. Cognitive prompts were added to the original laboratory manual of the course. The qualitative study was conducted within a pre- and post-experimental design using the California Critical Thinking Disposition Inventory (CCTDI) and the California Critical Thinking Skills Test (CCTST) as dependent variables.
funded by "SALSA Graduate School" of the German Science Foundation (DFG)
Fostering critical thinking by a gamification approach
We develop and validate (in a quantitative study) a modern, game-oriented, digital learning environment (“MINT-Town”) to foster two of the 21st century skills - critical thinking and problem solving - in the context of STEM education. The embedded gamification elements (i.e. quests, dialogs, avatars) increase the students’ engagement to work on complex problems.
The game consists of two parts: 1) the tutorial, and 2) the chemical part.
In part one, the player is confronted with a general STEM oriented problem situation; he has time to learn the basic controls of the game and several critical thinking subskills while the questline leads him through the problem-solving process.
In part two, the player has to transfer the acquired abilities to a specific chemical context.
The tutorial’s part is done, and it will be validated by an expert rating soon; the chemical part is still under development.
founded by "Deutsche Telekom-Stiftung"
Conducting a scientific investigation in Chemistry belongs to conceptual knowledge as well as to practical skills. The adequate use of chemicals, the correct assembly of flasks or the proper performing of a titration is not directly linked to meaningful learning. Following the cognitive load theory, these activities could be an important part of the extraneous load and reduce the capacity of the intrinsic load - necessary for learning the concept behind the experiment. This project compares students´ conceptual understanding while conducting an experiment by themselves or only watching a video of an experiment of the same topic.