Succeeding in Introduction to Physical Science: Is Mathematics Background Important?

Most college students complete courses in physical and life science as general education requirements. Although the level of difficulty of these survey courses is relatively low compared to upper-level science courses, a number of students still struggle to pass them. The purpose of this research was to investigate (a) the nature of mathematics background of students enrolling in physical science courses; (b) the change in mathematics ability of students at the end of the semester; and (c) what is the relationship between mathematics background and course completion and success. A 15-item test of basic mathematics skills was administered as a pre-test and post-test to students in two sections of Introduction to Physical Science at Arkansas Tech University. Results show that more than half of the students performed deficiently or failed the pre-test, that students who finished the course did not gain any significant knowledge in mathematics, that students who eventually withdrew from the course performed worst in the pre-test than students who persisted, and that there is a statistically significant relationship between pre- and post-test scores and students\u27 final grades in the course

Factors Associated With Students Graduating With STEM Degrees at a Military Academy: Improving Success by Identifying Early Obstacles

The United States is not graduating enough science, technology, engineering, and mathematics (STEM) majors for the increasing number of available employment opportunities and national security needs. The purpose of this study was to quantify the magnitude of STEM attrition at the United States Air Force Academy (USAFA), a military service academy and one of the three commissioning sources of officers for the United States Air Force. Also, the study identified factors associated with STEM attrition among students. Despite strong academic preparation, of the students who reported their intention to major in a STEM discipline as incoming freshmen, 36.4% switched and graduated with a nonSTEM degree. Two binary logistic regressions revealed that the best predictors associated with students graduating with a STEM major were their initial intention and motivation to major in these disciplines upon arrival at the USAFA and course grades in Calculus I, Calculus-based General Physics I, and Applications of Chemistry I. These findings suggest that, as in many other universities, students motivated to major in STEM may switch out if they struggle with prerequisite quantitative courses

Identifying academically at-risk incoming freshmen at a private university in Uruguay: Psychometric evaluation of a mathematics diagnostic test

This study determined to what extent the mathematics diagnostic test (MDT) used at the Catholic University of Uruguay (CUU) was psychometrically appropriate. Also, after removing “red-flagged” items, the study measured to what extent MDT scores correlated with academic success. It was found that five MDT items (out of 30) did not meet the guidelines and were discarded. The score on the remaining items showed the highest correlation with the number of mathematics courses completed, confirming that students with low MDT-Revised scores might need additional academic support to remain in the engineering program

Scientific Literacy in Central Appalachia Through Contextually Relevant Experiences: The “Reading the River” Project

Despite the best intentions of the United States educational system, implementing science reform efforts equitably and consistently throughout the nation is still a long-term goal. The light of scientific literacy has yet to shine brightly in many rural, isolated and economically depressed regions. Using Appalachia as a case in point, this paper provides a synopsis of the challenges of quality rural science education in the United States and the hope of new contextual and culturally relevant pedagogies aimed at engaging science students in inquiry research using their environmental surroundings as cognitive scaffoldings. The program Reading the River is showcased as an exemplary use of the students’ ‘backyard’ to integrate content knowledge in biology, chemistry, geology, physical science, social studies, practical living and mathematics

Betting on Better Buoyancy? Be Careful What You Wish For

The study of buoyancy is common in physics classrooms. In the last 20 years, several educators have described, theoretically and experimentally, buoyant forces and Archimedes’ principle, both in The Physics Teacher1- 8 and elsewhere.9-16 However, as far as I know, no one has reported on the pedagogical implications and experimental results of measuring the buoyant force acting on a submerged object using the overflow can method and a surface tension lowering agent (soapy water), as described in an online You- Tube video aimed at teachers and produced by PASCO.17 This article critically examines the claims presented in this video using experimental data and teacher advice

Using Item Response Theory to Improve Locally-Constructed Multiple Choice Tests: Measuring Knowledge Gains and Curricular Effectiveness

Current science education reform efforts emphasize teaching K-12 science using hands-on, inquiry activities. For maximum learning and probability of implementation among inservice teachers, these strategies must be modeled in college science courses for preservice teachers. About a decade ago, Morehead State University revised their science content courses to follow an inquiry approach. As part of the courses’ assessment, a locally-made, diagnostic pre- and post-test was prepared. The main purpose of this “ex post facto” study was to demonstrate how concepts from Item Response Theory can be used to detect and remove psychometrically faulty items, and how the remaining items can be used by teachers to determine science learning gains in an inquiry-based physical science course that implemented two different curricula, “Physics and Everyday Thinking” and “Interactions in Physical Science”

Falling PC Solitaire Cards: An Open Inquiry Approach

Many of us have played the PC Solitaire game that comes as standard software in many computers. Although I am not a great player, occasionally I win a game or two. The game celebrates my accomplishment by pushing the cards forward, one at a time, falling gracefully in what appears to look like a parabolic path in a drag-free environment. One day, as I was watching this progression, I asked myself what is the downward acceleration of the playing cards. Could the game programmer have used a realistic value of Earth’s acceleration due to gravity? It occurred to me that this could be an excellent open-inquiry activity for high school or introductory college physics students

Rosa Navarro-Haydon and the struggle for locally-relevant science education in Puerto Rico 1926-1966.

Rosa Navarro-Haydon played a fundamental role during a critical turning point in the history of science education in Puerto Rico. This eminent scholar developed and implemented elementary-level science curricula for public schools, wrote and published science booklets, articles and textbooks and trained thousands of science teachers. Rosa Navarro-Haydon was one of the first scholars to engage in science communication activities in Puerto Rico, such as writing science magazine articles for the general public. Unfortunately, education and scientific communities are unaware of the countless professional contributions made by Rosa Navarro-Haydon and her life as a science educator pioneer in Puerto Rico

Detecting Gender Bias Through Test Item Analysis

Many physical science and physics instructors might not be trained in pedagogically appropriate test construction methods. This could lead to test items that do not measure what they are intended to measure. A subgroup of these items might show bias against some groups of students. This paper describes how the author became aware of potentially biased items against females in his examinations, which led to the exploration of fundamental issues related to item validity, gender bias, and differential item functioning, or DIF. A brief discussion of DIF in the context of university courses, as well as practical suggestions to detect possible gender biased items, follows