Technology, math, and the early learner: Models for learning

As today’s preschoolers become the school-age children of tomorrow, early learning educators are faced with a unique and exciting challenge of integrating technology into mathematics instruction. This article examines theory, standards, guidelines, and rationale that supports technology in the preschool environment. Examining practices at 12 diverse preschool sites, four designs emerge as the “typical” models that enable early learners to engage and experience technology within a developmentally appropriate learning environment. The designs outlined are viewed through the lens of preschool mathematics instruction and provide early learning educators as well as parents with models for replication.     

Be My Guest: A Survey of Mass Communication Students' Perception of Guest Speakers

The use of guest speakers as a pedagogical technique across disciplines at the college level is hardly novel. However, empirical assessment of journalism and mass communication students' perceptions of this practice has not previously been conducted. To fill this gap, this article presents results from an online survey specifically administered to such students (N = 545) at a large public research university and a small liberal arts college. Results of statistical significance indicate that inviting a guest speaker is most valuable to students when the speaker comes from the industry and interacts face-to-face with the audience through personal examples and career tips rather than a formal slide-based lecture. Finally, this article contributes to and expands upon previous literature by offering a set of recommendations for the use of guest speakers in journalism and mass communication curriculum.     

Lessons learned from ten years of distance learning outreach

Objective:The study tested the efficacy of providing distance learning with real-time videoconferencing to broaden high school student knowledge of health careers.Methods:A pilot program was tried out and extended over ten years to include other schools in four different time zones and the National Library of Medicine. Survey results, site visits, and continued school participation were used as effectiveness indicators. Student ratings, site visits, and ongoing discussions were used to evaluate critical factors in the program.Results:Nine program factors contributed to success.Conclusions:Synchronous communication can be effective for outreach to special populations given appropriate infrastructure, technology, program design, and implementation.     

Surface protein gradients generated in sealed microchannels using spatially varying helium microplasma

Spatially varied surface treatment of a fluorescently labeled Bovine Serum Albumin (BSA) protein, on the walls of a closed (sealed) microchannel is achieved via a well-defined gradient in plasma intensity. The microchips comprised a microchannel positioned in-between two microelectrodes (embedded in the chip) with a variable electrode separation along the length of the channel. The channel and electrodes were 50 μm and 100 μm wide, respectively, 50 μm deep, and adjacent to the channel for a length of 18 mm. The electrode separation distance was varied linearly from 50 μm at one end of the channel to a maximum distance of 150, 300, 500, or 1000 μm to generate a gradient in helium plasma intensity. Plasma ignition was achieved at a helium flow rate of 2.5 ml/min, 8.5 kV_pk-pk, and 10 kHz. It is shown that the plasma intensity decreases with increasing electrode separation and is directly related to the residual amount of BSA left after the treatment. The plasma intensity and surface protein gradient, for the different electrode gradients studied, collapse onto master curves when plotted against electrode separation. This precise spatial control is expected to enable the surface protein gradient to be tuned for a range of applications, including high-throughput screening and cell-biomolecule-biomaterial interactions.     

Network-related teaching and changes in classroom seating

The extent to which teachers make changes in classroom seating reflects, in part, the degree to which they value promoting positive peer relationships in the classroom. We assessed the frequency with which teachers made both minor (i.e., involving only 2–3 students) and major (involving half or more students in the class) changes in classroom seating. We tested whether the frequency of seating changes was linked to teachers' beliefs about promoting positive peer relationships, their attunement to child- or peer-reports of peer victimization, and their concern about bullying at the school. Participants were 37 fourth-grade teachers and their students (N = 677). The frequency of major seating changes was negatively associated with teachers' peer-focused classroom seating (PFCS) beliefs and to their attunement to student peer victimization. Minor seating changes were positively associated with PFCS beliefs for teachers with low or average attunement to peer victimization; however, teachers highly attuned to peer victimization made fewer minor seating changes regardless of their PFCS beliefs. Implications for research and practice are discussed.