Exploring the use of multiple analogical models when teaching and learning chemical equilibrium

This study describes the multiple analogical models used to introduce and teach Grade 12 chemical equilibrium. We examine the teacher's reasons for using models, explain each model's development during the lessons, and analyze the understandings students derived from the models. A case study approach was used and the data were drawn from the observation of three consecutive Grade 12 lessons on chemical equilibrium, pre‐ and post‐lesson interviews, and delayed student interviews. The key analogical models used in teaching were: the “school dance”; the “sugar in a teacup”; the “pot of curry”; and the “busy highway.” The lesson and interview data were subject to multiple, independent analyses and yielded the following outcomes: The teacher planned to use the students' prior knowledge wherever possible and he responded to student questions with stories and extended and enriched analogies. He planned to discuss where each analogy broke down but did not. The students enjoyed the teaching but built variable mental models of equilibrium and some of their analogical mappings were unreliable. A female student disliked masculine analogies, other students tended to see elements of the multiple models in isolation, and some did not recognize all the analogical mappings embedded in the teaching plan. Most students learned that equilibrium reactions are dynamic, occur in closed systems, and the forward and reverse reactions are balanced. We recommend the use of multiple analogies like these and insist that teachers always show where the analogy breaks down and carefully negotiate the conceptual outcomes. © 2005 Wiley Periodicals, Inc. J Res Sci Teach 42: 1135–1159, 2005     

The occurrence of analogies in elementary school science books

An analogy is a model drawn from one contextand used to support understanding in anothercontext. This study investigates the extent towhich analogies in instructional science booksare provided by authors. The books surveyed areavailable from commercial suppliers andintended for use in the elementary schoolclassroom with 7 to 11 year old children.Eighty texts were analysed for the presence orabsence of analogies. Forty-five of the booksoffered no analogies at all. In the remainingthirty-five books, 92 analogies were found.These were classified in line with earlier workon analogies for older students by Curtis andReigeluth (1984) and the findings arediscussed. The extent to which teachers candraw upon the analogies in such texts tosupport children's understanding isconsidered.     

Facilitating problem solving in high school chemistry

The major purpose for conducting this study was to determine whether certain instructional strategies were superior to others in teaching high school chemistry students problem solving. The effectiveness of four instructional strategies for teaching problem solving to students of various proportional reasoning ability, verbal and visual preference, and mathematics anxiety were compared in this aptitude by treatment interaction study. The strategies used were the factor-label method, analogies, diagrams, and proportionality. Six hundred and nine high school students in eight schools were randomly assigned to one of four teaching strategies within each classroom. Students used programmed booklets to study the mole concept, the gas laws, stoichiometry, and molarity. Problem-solving ability was measured by a series of immediate posttests, delayed posttests and the ACS-NSTA Examination in High School Chemistry. Results showed that mathematics anxiety is negatively correlated with science achievement and that problem solving is dependent on students' proportional reasoning ability. The factor-label method was found to be the most desirable method and proportionality the least desirable method for teaching the mole concept. However, the proportionality method was best for teaching the gas laws. Several second-order interactions were found to be significant when mathematics anxiety was one of the aptitudes involved.     

Second Graders Learn Animal Adaptations through Form and Function Analogy Object Boxes

This study examined the use of form and function analogy object boxes to teach second graders (n = 21) animal adaptations. The study used a pretest–posttest design to examine animal adaptation content learned through focused analogy activities as compared with reading and Internet searches for information about adaptations of animals followed by making an informative puppet play. Students participated in six week‐long lesson sets, each addressing adaptations of two animals, which alternated between the two conditions. In the analogy condition, students matched cards explaining form and function analogies of animal body parts or homes to analogous manufactured items. They mapped analogies, thought of alternate manufactured items, and created new analogies. Students scored similarly on material to be taught through both conditions on the pretest, but made significantly higher posttest mean scores (76.1% analogy versus 57.2% traditional condition) with large effect size (partial η² = 0.58) on animal adaptation content learned through the analogy activities. This study shows the usefulness of form and function analogies in teaching product innovations to second‐grade students, indicating that early childhood students are able to successfully engage in sophisticated analogy activities. Efficacy of the analogy activities was related to objects that focused attention, motivated, and gave concrete representations of concepts; to cards and graphic organizers for organization, connections, and memory; and to complex thinking activities that challenged students and promoted peer interaction.     

The use of analogies in language teaching: Representing the content of teachers' practical knowledge

This study sought to determine how experienced language teachers use analogies to help students comprehend a text on the course of their regular teaching routines. It is assumed that analogies constitute one important component of the content of teachers' practical knowledge in the context of reading-comprehension instruction. The framework of the study drew from Shulman's notion of 'pedagogical content knowledge'; the perspective was the analogy-provider (e.g. teacher or textbook author). Eight lessons taught by eight different teachers were observed and analysed for the presence of analogies. The frequent use of analogies, continuously under discussion in the literature about science education, seems at least open to question. The research suggests that teacher education programmes for language teaching should include information about developing and evaluating instructional analogies.     

Collaborative and self-generated analogies in science education

It has long been recognised that analogies may be a useful tool in science education. At the same time, it has been found that there are challenges to using analogies in teaching. For example, students might not identify a suitable analogy, might not recognise how the taught target domain is similar to the source domain to which it is compared, or may fail to realise where the analogy breaks down. The present study offers a review of two trends which reflect the ambition to come to terms with such challenges: self-generated analogies, making use of students’ own analogies in teaching, and analogy generation in collaborative settings, such as in small-group work. Empirical studies show predominately positive results with regard to students’ enjoyment and learning gains, and point to opportunities for formative assessment. The specificities of language in conjunction with analogy and the role of analogies in authentic science classroom discourse are suggested as areas of study that deserve more attention going forward.     

The evolution of an approach for using analogies in teaching and learning science

An important contribution to effective teaching and learning can be made by teachers' understanding of the central topics in each subject area and knowing how to transform their content knowledge into knowledge for teaching. One aspect of this knowledge is the use of analogies which can effectively communicate concepts to students of particular backgrounds and prerequisite knowledge. Indeed, analogies are considered to be an important component in the repertoire of effective teachers. However, research about teachers' use of analogies in science lessons provides little guidance about the optimum approaches that may be taken by preservice teachers, novice teachers, experienced teachers or reluctant analogy users. This paper describes the evolution of an approach for using analogies in science teaching that addresses both findings from the research literature and recognises the needs of practising teachers. Specializations: learning and teaching science concepts, technology education.     

Science Teachers’ Analogical Reasoning

Analogies can play a relevant role in students’ learning. However, for the effective use of analogies, teachers should not only have a well-prepared repertoire of validated analogies, which could serve as bridges between the students’ prior knowledge and the scientific knowledge they desire them to understand, but also know how to introduce analogies in their lessons. Both aspects have been discussed in the literature in the last few decades. However, almost nothing is known about how teachers draw their own analogies for instructional purposes or, in other words, about how they reason analogically when planning and conducting teaching. This is the focus of this paper. Six secondary teachers were individually interviewed; the aim was to characterize how they perform each of the analogical reasoning subprocesses, as well as to identify their views on analogies and their use in science teaching. The results were analyzed by considering elements of both theories about analogical reasoning: the structural mapping proposed by Gentner and the analogical mechanism described by Vosniadou. A comprehensive discussion of our results makes it evident that teachers’ content knowledge on scientific topics and on analogies as well as their pedagogical content knowledge on the use of analogies influence all their analogical reasoning subprocesses. Our results also point to the need for improving teachers’ knowledge about analogies and their ability to perform analogical reasoning.     

Evaluating the effects of analogy enriched text on the learning of science: The importance of learning indexes

Research has shown that differences in the prior knowledge of the participants and in the learning indexes adopted can explain why some studies show positive learning effects of analogy enriched text while others do not. In the present studies, these two factors were combined into one through the construction of a learning index that measured incremental positive changes in the participants' prior knowledge after reading an analogy enriched or no analogy text. A second learning index was also used to evaluate whether the participants created well-formed conceptual models after reading the science text. These learning indexes were used in two studies in which the effects of analogy enriched versus no analogy text were compared on the learning of the scientific explanations of the day/night cycle and of the seasons. The participants were 3rd and 5th graders in the first study and 6th graders and college students in the other. Although only few of the participants learned the correct scientific explanation, those who read the analogy enriched text produced more incremental positive changes in their pretest explanations at posttest and delayed test and created more well-formed conceptual models close to the scientific one than those who read the no analogy text. They also recalled more information and created fewer invalid inferences in their recalls. The results indicate that analogies can be used without reservation to facilitate the learning of science and have broader implications about how to evaluate the learning of science in general.     

Promoting fourth graders' conceptual change of their understanding of electric current via multiple analogies

For the past two decades, a growing amount of research has shown that the use of analogies in science teaching and learning promotes meaningful understanding of complex scientific concepts (Gentner, 1983 ; Glynn, 1989 ; Harrison & Treagust, 1993 ; Wong, 1993 ). This article presents a study in which multiple analogies were used as scaffolding to link students' prior understanding of daily life events to knowledge of the scientific domain. The study was designed to investigate how multiple analogies influence student learning of a complex scientific concept: the electric circuit. We used several analogies in a set of learning materials to present the concepts of parallel and series circuits. Thirty‐two fourth graders participated in this study and were randomly assigned to four groups. The four groups were named nonanalogy (control), single analogy, similar analogies, and complementary analogies, according to the materials they used in this study. The results demonstrated that using analogies not only promoted profound understanding of complex scientific concepts (such as electricity), but it also helped students overcome their misconceptions of these concepts. In particular, we found that the reason the students had difficulty understanding the concept of electricity was because of their ontological presupposition of the concept. Implications for teaching and learning are discussed. © 2005 Wiley Periodicals, Inc. J Res Sci Teach 42: 429–464, 2005     

Using analogies to improve the teaching performance of preservice teachers

Prior research in both education and cognitive science has identified analogy making as a powerful tool for explanation as well as a fundamental mechanism for facilitating an individual's construction of knowledge. While a considerable body of research exists focusing on the role analogy plays in learning science concepts, relatively little is known about how instruction in the use of analogies might influence the teaching performance of preservice teachers. The primary objective of this study was to investigate the relationship between pedagogical analogy use and pedagogical reasoning ability in a sample of preservice elementary teachers (PTs), a group that has been identified for their particular difficulties in teaching science. The study utilized a treatment/contrast group design in which the treatment group was provided instruction that guided them in the generation of analogies to aid in the explanation phase of learning cycle lessons. A relationship between analogy use and positive indicants of teaching performance was observed and a case study of a low performing preservice teacher who drastically improved teaching performance using analogy‐based pedagogy is presented. A notable effect on conceptual understanding of Newton's Third Law as a result of two brief analogy‐based demonstration lessons was also observed. © 2007 Wiley Periodicals, Inc. J Res Sci Teach 44: 565–585, 2007.     

Effects of teacher training on children's analogical reasoning performance

Two studies were conducted to assess the effects of teacher training in analogical reasoning on students' performance of analogy tasks. Study One focused on elementary school teachers and students, while Study Two involved early childhood teachers. In Study One, 25 fourth-grade teachers were assigned either to Control, or to Level I or Level II treatment conditions. The Level I condition involved the receipt of detailed analogy lessons. The Level II condition encompassed both the receipt of instructional materials and explicit training for teachers in their underlying theory and use. Further, 19 of the 25 treatment and control teachers were observed during the course of the study to determine the influence of observation of teachers on students' analogical reasoning. Students' performance of an analogy task was compared prior to and following teacher-delivered instruction by means of an analysis of covariance procedure. Results indicated that students in Level II classrooms significantly outperformed Level I students, who significantly outperformed students in Control classrooms. Teacher observation was found to be a significant factor in the performance of Level I, but not Level II or Control, students. In Study Two, teachers participating in two summer programs for gifted preschoolers were taught how to deliver instruction in analogical reasoning to young children, ages three to six. Results demonstrated that children receiving explicit instruction in analogical reasoning scored significantly better on an analogy task than the children assigned to control. No effect for age, race, gender, or Socioeconomic studies were found. Implications of the results of these two studies for educational practice are discussed.     

The Nature of Discourse throughout 5E Lessons in a Large Enrolment College Biology Course

Large enrolment science courses play a significant role in educating undergraduate students. The discourse in these classes usually involves an instructor lecturing with little or no student participation, despite calls from current science education reform documents to elicit and utilize students’ ideas in teaching. In this study, we used the 5E instructional model to develop and implement four lessons in a large enrolment introductory biology course with multiple opportunities for teacher-student and student-student interaction. Data consisted of video and audio recordings of whole-class and small-group discussions that took place throughout the study. We then used a science classroom discourse framework developed by Mortimer and Scott (2003) to characterize the discursive interactions in each 5E lesson phase. Analysis of the data resulted in two assertions. First, the purpose, communicative approach, patterns of discourse, and teaching interventions were unique to each 5E lesson phase. Second, the type of lesson topic influenced the content of the discourse. We discuss how the findings help characterize the discourse of each phase in a 5E college science lesson and propose a model to understand internalization through discursive interaction using this reform-based approach. We conclude with implications for facilitating discourse in college science lessons and future research. This study provides support for using the discourse framework to characterize discursive interaction in college science courses.     

Organization and use of the mental lexicon by deaf and hearing individuals

Two experiments explored the taxonomic organization of mental lexicons in deaf and hearing college students. Experiment 1 used a single-word association task to examine relations between categories and their members. Results indicated that both groups' lexical knowledge is similar in terms of overall organization, with associations between category names and exemplars stronger for hearing students; only the deaf students showed asymmetrical exemplar-category relations. Experiment 2 used verbal analogies to explore the application of taxonomic knowledge in an academically relevant task. Significant differences between deaf and hearing students were obtained for six types of analogies, although deaf students who were better readers displayed response patterns more like hearing students'. Hearing students' responses reflected their lexical organization; deaf students' did not. These findings implicate the interaction of word knowledge, world knowledge, and literacy skills, emphasizing the need to adapt instructional methods to student knowledge in educational contexts.     

When is a science analogy like a social studies analogy? A comparison of text analogies across two disciplines

This textbook survey analyzes the construction and use of analogies in social science texts and compares the results to an earlier analysis of physical science texts. Although the results indicate that the categories in the Curtis and Reigeluth classification system for analogy construction were consistent across disciplines, several differences were revealed related to how and when the analogy is used as an instructional design strategy.     

Rhyme Awareness,Orthographic Analogy Use,Phonemic Awareness and Reading: An examination of relationships

It is suggested that children learning to read require phonemic awareness before being able to make orthographic analogies during reading (Ehri & Robbins, 1992) and that phonemic awareness is a better discriminator of children who will benefit from orthographic analogies than rhyme awareness (Walton, 1995). It has also been found that orthographic analogy use does not make an independent contribution to early reading ability (Wood, 1999). The present study investigates which skills are best able to account for orthographic analogy use during early reading and tests the finding that there is no independent association between reading ability and orthographic analogy use. Results suggest that phonemic awareness and reading experience are best able to account for analogy use, and that orthographic analogy use does directly contribute to early reading ability. Rhyme awareness was also associated with orthographic analogy use, but this contribution was less than that of phonemic awareness, and was not significant after the contribution of phonemic awareness was taken into account.     

Exploring Biology Teachers’ Pedagogical Content Knowledge in the Teaching of Genetics in Swaziland Science Classrooms

This study explored the pedagogical content knowledge (PCK) and its development of four experienced biology teachers in the context of teaching school genetics. PCK was defined in terms of teacher content knowledge, pedagogical knowledge and knowledge of students’ preconceptions and learning difficulties. Data sources of teacher knowledge base included teacher-constructed concept maps, pre- and post-lesson teacher interviews, video-recorded genetics lessons, post-lesson teacher questionnaire and document analysis of teacher's reflective journals and students’ work samples. The results showed that the teachers’ individual PCK profiles consisted predominantly of declarative and procedural content knowledge in teaching basic genetics concepts. Conditional knowledge, which is a type of meta-knowledge for blending together declarative and procedural knowledge, was also demonstrated by some teachers. Furthermore, the teachers used topic-specific instructional strategies such as context-based teaching, illustrations, peer teaching, and analogies in diverse forms but failed to use physical models and individual or group student experimental activities to assist students’ internalization of the concepts. The finding that all four teachers lacked knowledge of students’ genetics-related preconceptions was equally significant. Formal university education, school context, journal reflection and professional development programmes were considered as contributing to the teachers’ continuing PCK development. Implications of the findings for biology teacher education are briefly discussed.     

Pre-service mathematics teachers’ learning and teaching of activity-based lessons supported with spreadsheets

In this study, 12 pre-service mathematics teachers worked in teams to develop their knowledge and skills in using teacher-led spreadsheet demonstrations to help students explore mathematics concepts, stimulate discussions and perform authentic tasks through activity-based lessons. Pre-service teachers’ lesson plans, their instruction of the lessons designed, experiences and lesson enactment outcomes were examined. The pre-service teachers in the study were able to develop and demonstrate their knowledge and skill adequately in designing and enacting activity-based mathematical lessons supported with spreadsheets. The results also showed that the pre-service teachers’ use of the spreadsheet as an instructional tool promoted student in-depth mathematical concept formation and an activity-based learning approach to make lessons less teacher centred and more interactive.