Biological phenomena can be investigated at multiple levels, from the molecular to the cellular to the organismic to the ecological. In typical biology instruction, these levels have been segregated. Yet, it is by examining the connections between such levels that many phenomena in biology, and complex systems in general, are best explained. We…

The purpose of the present article is to give an account of the emergence of knowledge pertaining to the transition from arithmetic to algebra in the course of a debate in a grade 7 classroom. This debate follows two other instances of work: (1) the adidactic interaction between each student and a given problem, (2) the adidactic interaction of…

The conversation between myself and Professor Lederman took place in Malmö, Sweden on August 25, 2007. The purpose of the conversation was to elaborate on the past, present and future of nature of science research and also to provide insights for beginning researchers. In this text I am providing the questions about which we talked and my…

In social studies classes, there is a longstanding interest in how societies evolve and change over time. However, as stories of the past unfold, it is often difficult to identify a direct link between causes and effects, so students are forced to accept at face value the interpretations of economists, political scientists, historians,…

Modern information technology and computer science curricula employ a variety of graphical tools and development environments to facilitate student learning of introductory programming concepts and techniques. While the provision of interactive features and the use of visualization can enhance students' understanding and assist them in grasping…

G. L. Anderson reported finding an interaction between drill and meaningful methods of instruction with fourth grade student ability and achievement. The reanalysis overturns Anderson's conclusion that there is an aptitude treatment interaction within classes. (BJG)

Authors who write introductory business statistics texts do not agree on when to use a t distribution and when to use a Z distribution in both the construction of confidence intervals and the use of hypothesis testing. In a survey of textbooks written in the last 15 years, we found the decision rules to be contradictory and, at times, the…

The purpose of this study was to explore the effects of intensive instruction (II) in either the observation of details (cue attendance - CA) or the production of tenable hypotheses (hypothesis generation - HG) about a science problem. Two questions were investigated: (1) Were there significant differences between students intensively instructed…

Seventy-two university students were exposed to one of four repetition treatments for one of three different amounts of information presented in a chunked format. Implicit chunk repetition, i.e., the presentation of words not present in the original word list but logically belonging to a previously seen chunk, facilitated acquisition and retention…

A classroom exercise which encourages experimentation including formulation and testing of conjectures about number relationships involving factors and multiples is illustrated. (MN)

Thirty-nine normal pre-school and 48 older mentally handicapped children of similar vocabulary age were tested on a sentence comprehension test under three different presentation conditions. Results showed that presentation conditions did not affect normal children, but mentally handicapped children were adversely affected by the condition in…

Defines the relationship between theory and practice with specific reference to the inquiry process. Presents a five phase explanation of the inquiry process and provides a practical illustration of each phase. (Author/DB)

This study examined the effects of organizational control strategies on the teacher's instructional role. It was hypothesized that the teacher's instructional role would be affected by his or her background such as sex, discipline, experience and tenure status as well. (Author/RK)

Describes a project that changed the social studies curriculum by changing the method of teaching. (MB)

This report results from studies that tested two variations of Bloom's decreasing variability hypothesis using performance on successive units of achievement in four graduate classrooms that used mastery learning procedures. Data do not support the decreasing variability hypothesis; rather, they show no change over time. (SM)