Black girls represent a unique subpopulation of science learners. Black girls are unique because they consistently outperform Black boys in science. Despite this trend, Black girls often face dual marginalization in STEM classrooms and professions. Racial and gender marginalization can inhibit the success of Black girls in science if researchers,…

The National Science Foundation funded a synthesis study on the status, contributions, and future direction of discipline-based education research (DBER) in physics, biological sciences, geosciences, and chemistry. DBER combines knowledge of teaching and learning with deep knowledge of discipline-specific science content. It describes the…

Describes differing concepts of nature held by systematists from 1789-1859, connections between these concepts, and how they saw relationships among groups and made classifications. Discusses what these systematists intended their classifications to represent and how these intentions relate to classifications used by twentieth-century biologists.…

Tested Richard Duschl's triadic model of the growth of scientific knowledge against research practices of 10 accomplished life scientists. Reports that the scientists were willing to change their aims, methods, or theories and were both realists and relativists depending on the scientific discourse about the phenomena in question. Discusses…

Discusses how handedness at one level may give rise to handedness at another. Presents examples from plants and animals, molecules, atoms, to elementary particles. Examines the chiral symmetry in life and when it starts. (YP)

This study explored and documented Taiwanese students' alternative conceptions of animal classification. We examined the understanding of the "animal", "vertebrate" and "invertebrate", "fish", "amphibian", "reptile", "bird", and "mammal" concepts among elementary,…

Describes three experiments that examined how children (4- to 11-year-olds) use their knowledge of the attributes of living things to infer whether particular objects are alive. (HOD)

Described are animals that can filter their food out of the water. Various structures modified to strain plankton and small animals from water are detailed. The adaptive significance of these structures is discussed. (CW)

The underlying principles and assumptions associated with DNA histograms are discussed along with the characteristics of fluorescent probes. Information theory was described and used to calculate the information content of a DNA histogram. Two major types of DNA histogram analyses are proposed: parametric and nonparametric analysis. Three levels…

A questionnaire was sent to the 385 public schools in New York State that had indicated they offered at least one advanced science course. A summary of data provided from 232 questionnaires returned is presented. One finding is that the most common advanced course offered was in the biological sciences. (JN)

Discussed are problems revealed in student responses to a practical task which formed part of an advanced level examination. The frequencies with which some misconceptions about cell reproduction and genetics occurred are presented. The nature of these misconceptions is analyzed and their implications discussed. (CW)

Described is the evaluation of an inservice course on biotechnology. Evaluated were the influence that the course had on teacher knowledge, use of practical work, problem solving investigations and theoretical aspects of biotechnology. A practical model of inservice evaluation is provided. (Author/CW)

Discusses variables which determine the strategies animals use to organize their lives. Describes advances in understanding animal behaviors. Shows how game theory has helped to explain the existence of alternative behavioral strategies and the constraints under which organizers exist. (Author/CW)

The meanings of eight science terms (volume, organism, motion, energy, molecule, cell, enzyme, fossil) were studied by 9-, 13-, and 17-year-olds. Results indicate that the schools were ineffective in increasing numbers of students who mastered these terms between seventh and eleventh grade. Reasons for this finding are discussed. (Author/JN)

Presented is a study in which students' intellectual reasoning development was evaluated following instruction that emphasized formal operations in a traditional lecture format. Results indicated that formal-operational students had significantly more success in the three reasoning areas than transitional students and transitional students had…