Effect of a Problem Based Simulation on the Conceptual Understanding of Undergraduate Science Education Students

A study of the effect of science teaching with a multimedia simulation on water quality, the “River of Life,” on the science conceptual understanding of students (N = 83) in an undergraduate science education (K-9) course is reported. Teaching reality-based meaningful science is strongly recommended by the National Science Education Standards (National Research Council, 1996). Water quality provides an information-rich context for relating classroom science to real-world situations impacting the environment, and will help to improve student understanding of science (Kumar, 2005a; Kumar and Chubin, 2000). The topics addressed were classes of organisms that form river ecosystem, dissolved oxygen, macroinvertebrates, composition of air, and graph reading skills. Paired t-test of pre- and post-tests, and pre- and delayed post-tests showed significant (p < 0.05) gains. The simulation had a significant effect on the conceptual understanding of students enrolled in a K-9 science education course for prospective teachers in the following areas: composition of air, macroinvertebrates, dissolved oxygen, classes of organisms that form a river ecosystem, and graph reading skills. The gain was more in the former four areas than the latter one. A paired t-test of pre- and delayed post-tests showed significant (p < 0.05) gains in the water quality and near transfer subsets than the dissolved oxygen subset. Additionally students were able to transfer knowledge acquired from the multimedia simulation on more than one concept into teachable stand-alone lesson plans.     

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.     

Analyzing difficulties with mole-concept tasks by using familiar analog tasks

This study was conducted to determine which skills and concepts students have that are prerequisites for solving moles problems through the use of analog tasks. Two analogous tests with four forms of each were prepared that corresponded to a conventional moles test. The analogs used were oranges and granules of sugar. Slight variations between test items on various forms permitted comparisons that would indicate specific conceptual and mathematical difficulties that students might have in solving moles problems. Different forms of the two tests were randomly assigned to 332 high school chemistry students of five teachers in four schools in central Indiana. Comparisons of total test score, subtest scores, and the number of students answering an item correctly using appropriate t-test and chi square tests resulted in the following conclusions: (1) the size of the object makes no difference in the problem difficulty; (2) students understand the concepts of mass, volume, and particles equally well; (3) problems requiring two steps are harder than those requiring one step; (4) problems involving scientific notation are more difficult than those that do not; (5) problems involving the multiplication concept are easier than those involving the division concept; (6) problems involving the collective word “bag” are easier to solve than those using the word “billion”; (7) the use of the word “a(n)” makes the problem more difficult than using the number “1”.     

Undergraduate Research and Service-Learning Programs in a Kinesiology Program at a Teaching University

High-impact practices foster student success, but faculty faced with heavy teaching loads and lack of resources and infrastructure are challenged to implement such practices. Kinesiology faculty at California State University, East Bay collaborated to implement two student programs: Kinesiology Research Group and Get Fit! Stay Fit! The Kinesiology Research Group, a faculty–student research group, and Get Fit! Stay Fit!, a service learning experience, partnered to consolidate human and structural resources. Student–faculty mentoring circles were used to support this innovative partnership. Here, we report student perceptions of the value of these programs to their academic and professional development.     

SodaConstructing knowledge through exploratoids

In this article, we describe a preliminary study that integrates research on engineering design activities for K‐12 students with work on microworlds as learning tools. Here, we extend these bodies of research by exploring whether—and how—authentic recreations of engineering practices can help students develop conceptual understanding of physics. We focus on the design–build–test (DBT) cycle used by professional engineers in simulation‐based rapid modeling. In this experiment, middle‐school students worked for 10 hr during a single weekend to solve engineering design challenges using SodaConstructor, a Java‐based microworld, as a simulation environment. As a result of the experiment, students learned about center of mass. Our data further suggest that in the process of simulation‐based modeling, rapid iterations of the DBT cycle progressively linked students' interest in the design activities and understanding of the concept of center of mass. We suggest that these rapid iterations of the DBT cycle functioned as exploratoids: short fragments of exploratory action in a microworld that cumulatively develop interest in and understanding of important scientific concepts. © 2006 Wiley Periodicals, Inc. J Res Sci Teach     

Is Technology the Answer? Investigating Students’ Engagement in Math

Abstract

As technology has spread in schools, we know little about how technology mediates the performance of primary-aged students and their engagement in mathematics. Given the well-established link between achievement and engagement, understanding the impact of technology on engagement can inform practice. This study examines how technology might impact second graders’ engagement in mathematics using IXL, a math intervention administered on the iPad, as compared to a traditional paper–pencil approach. Although there was not a statistically significant difference in the pre–post student engagement surveys, the teacher focus group described increased student independence using technology and found it easier to differentiate and provide corrective feedback, while helping students build fluency.