A complex terminology developed around the evolutionary concept of adaptation. One definition of adaptation is synonymous with adaptive evolution and denotes a process of population change driven by natural selection resulting in individuals better able to survive and reproduce in a particular environment (compared to the population before the…

This is a conceptual paper aimed at chemistry educators. The purpose of this paper is to illustrate the use of the semantic code of Legitimation Code Theory in chemistry teaching. Chemistry is an abstract subject which many students struggle to grasp. Legitimation Code Theory provides a way of separating out abstraction from complexity both of…

The Next Generation Science Standards (NGSS) call for students to exhibit an in-depth understanding of scientific inquiry practices, including direct observation, creative design thinking, and argumentation based on evidential learning. To support academic equity for multilingual learners, these new expectations require reconceptualization of…

Words with well-known meaning in colloquial language often make up an educational challenge when introduced as terms with formal scientific meaning. New connections must be established between the word, already constrained by existing meaning and reference, and the intended formal scientific meaning and reference. A two-dimensional…

In recent years, educators have become ever more aware of the critical role that vocabulary knowledge plays in the academic lives of their students. Vocabulary knowledge is fundamental to the comprehension of text and is most effective when it relates new words to students' existing vocabulary and background knowledge. Effective vocabulary…

How can we teach science to English language learners (ELLs) when even our native English speakers have trouble reading the textbook? To help science teachers meet this challenge, this article presents six text-comprehension strategies used by English for Speakers of other Languages (ESOL) teachers: metalinguistic awareness development,…

The development of a 20-item semantic differential assessment instrument for measuring student attitudes toward the subject of chemistry is described (Attitude toward the Subject of Chemistry Inventory-ASCI). Instrument subscales and survey items pertain to interest and utility, anxiety, intellectual accessibility, emotional satisfaction, and…

This paper focuses on the discursive and grammatical means by which science students extract and objectify knowledge from the dynamics of the laboratory setting. I argue that nominalization is a particularly important strategy by which this curriculum unit and teacher apprentice students into objectifying the data, evidence, and conclusions from…

Examines the technical vocabulary of genetics as a source of error and confusion. Suggests that it is necessary to identify different types of problems associated with terminology and to organize them into logical classes to deal effectively with the difficulties. Highlights terms misused in textbooks. (RT)

Describes the erroneous use of the term "dissolve" in chemistry textbooks to refer to what is, more properly speaking, a chemical reaction. (WRM)

Considers several aspects of quantitative relationships involved in learning physics. Includes discussions of proportionality, various kinds of equality, and the need for generality. Argues that clear distinctions are necessary if the physics curriculum is to be examined with regard to pupil outcomes. (TW)