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Register a new userSecret objectives: promoting inquiry and tackling preconceptions in teaching laboratories
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In its most general form, a `secret objective is any inconsistency between the experimental reality and the information provided to students prior to starting work on an experiment. Students are challenged to identify the secret objectives and then given freedom to explore and understand the experiment, thus encouraging and facilitating genuine inquiry elements in introductory laboratory courses. Damping of a simple pendulum is used as a concrete example to demonstrate how secret objectives can be included. We also discuss the implications of the secret objectives method and how this can provide a link between the concepts of problem based learning and inquiry style labs.
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We tested the effectiveness on learning of hands-on, night-time laboratories that challenged student misconceptions in a non-major introductory astronomy class at Rensselaer Polytechnic Institute. We present a new assessment examination used to assess learning in this study. We were able to increase learning, at the 8.0 sigma level, on one of the moon phase objectives that was addressed in a cloudy night activity. There is weak evidence of some improvement on a broader range of learning objectives. We show evidence that the overall achievement levels of the four sections of the class is correlated with the amount of clear whether the sections had for observing, even though the learning objectives were addressed primarily in activities that did not require clear skies. This last result should be confirmed with future studies. We describe our first attempt to cycle the students through different activity stations in an attempt to handle 18 students at a time in the laboratories, and lessons learned from this.
The Principle of Least Action (PLA) in Optics can be confusing to students, in part due to the Calculus of Variations, but also because of the subtleties of the actual principle. To address this problem, three simulations of the PLA are presented so students can learn the Action Principle in an experiential and interactive manner. Simulations such as MITs OpenRelativity and PhETs Quantum Mechanics have become a popular pedagogical tool to demystify abstract physical phenomena. This paper aims to help undergraduate students understand the Action Principle by introducing three numerical simulations: light reflecting in equal angles, light refracting in different mediums, and light moving between two points in the least time. The interactive simulations discussed in this paper are available here.
This STEM education study investigates the Streamline to Mastery professional development program, in which teachers work in partnership with university researchers to design professional development opportunities for themselves and for fellow teachers. Our research describes the process of teacher professional growth both through changes in agency and through a shared pursuit of an improved understanding of classroom scientific inquiry. Videos, emails, lesson reflections, survey responses, and interviews were analyzed to glean insight into changes in teacher discourse around inquiry and into their shifts in participation within the professional community they established. Implications for professional development in STEM education are discussed.
Despite the negative stereotypes still overshadowing community colleges, scores of freshmen nationwide are deliberately beginning their college careers at these institutions, and the numbers are increasing more than twice as fast as those of four-year schools. Approximately 300,000 of these students take introductory astronomy each year as the last formal exposure to science most of them will ever have, and at least one-third of these students do so at a community or two-year college. The importance of investing in and devoting resources and training to serve this population - everyone, demographically speaking - cannot be overstated. Yet the overwhelming majority of those who do serve this population are lacking in both areas. The community colleges heavy emphasis on teaching and student success creates both challenges and opportunities that educators must meet head-on using a variety of methods and innovative strategies, teamwork and faculty support systems, and clever workarounds. Here, we introduce both the student and faculty populations, examine some characteristics of both populations, and offer some advice for those looking to teach introductory astronomy at a community college.
The need for highly qualified physics teachers in the U.S. is well established, and reform efforts are underway to develop novel and innovative teacher professional development experiences to improve the quality of K-12 physics education. Streamline to Mastery is an NSF-funded, learner-centered professional development program that seeks to capitalize on teachers knowledge and experience to move physics teachers toward mastery in their fields. Teacher participants in this teacher-driven program choose their own goals and areas of growth. One of these areas has been the development and implementation of inquiry-oriented curriculum, as well as the adaptation of traditional lessons toward a greater inquiry orientation. Results indicate that teachers conceptions of inquiry teaching and learning have become more expert-like as they have engaged in teacher participant-driven experiences in the pursuit of greater understanding and more effective classroom practice.
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