Exploring science teachers' efforts to frame phenomena in the community

This article examines two teachers' efforts to re-organize their science teaching around issues of environmental and food justice in the urban community where they teach through the pedagogical approach of community-oriented framing. We introduce this approach to teachers' framing of phenomena in community as supporting students' framing of phenomena as personally and locally relevant. Drawing on classroom observations of remote learning during the COVID-19 pandemic, we took an analytic approach that characterized features of classroom discourse to rate community-oriented framing at the lesson level. Results show that teachers framed phenomena as both social and scientific, and as rooted in students' lived experiences, with classroom activities designed to gather localized and personalized evidence needed to explain or model phenomena. We also share examples of how Black and Latinx students took up this framing of phenomena in their classroom work. By providing a detailed description of the launch and implementation of activities, findings illustrate how community-oriented framing supported teachers in posing local questions of equity and justice as simultaneously social and scientific, and helping students perceive science learning as meaningful to their everyday lives. Community-oriented framing offers a practical means of designing locally and socially relevant instruction. We contribute to justice-centered science pedagogies by conceptualizing transformative science learning environments as those in which students understand their goal in science class as understanding, and later addressing, inequities in how socioscientific issues manifest in their community

Performance of magnetic resonance imaging in the evaluation of first-time and reoperative primary hyperparathyroidism.

BackgroundPreoperative imaging in patients with primary hyperparathyroidism and a previous parathyroid operation is essential; however, performance of conventional imaging is poor in this subgroup. Magnetic resonance imaging appears to be a good alternative, though overall evidence remains scarce. We retrospectively investigated the performance of magnetic resonance imaging in patients with and without a previous parathyroid operation, with a separate comparison for dynamic gadolinium-enhanced magnetic resonance imaging.MethodsAll patients undergoing magnetic resonance imaging prior to parathyroidectomy for primary hyperparathyroidism (first time or recurrent) between January 2000 and August 2015 at a high-volume, tertiary care, referral center for endocrine operations were included. We compared the sensitivity and positive predictive value of magnetic resonance imaging with conventional ultrasound and sestamibi on a per-lesion level.ResultsA total of 3,450 patients underwent parathyroidectomy, of which 84 patients with recurrent (n = 10) or persistent (n = 74) disease and 41 patients with a primary operation were included. Magnetic resonance imaging had a sensitivity and positive predictive value of 79.9% and 84.7%, respectively, and performance was good in both patients with and without a previous parathyroid operation. Adding magnetic resonance imaging to the combination of ultrasound and sestamibi resulted in a significant increase in sensitivity from 75.2% to 91.5%. Dynamic magnetic resonance imaging produced excellent results in the reoperative group, with sensitivity and a positive predictive value of 90.1%.ConclusionTechnologic advances have enabled faster and more accurate magnetic resonance imaging protocols, making magnetic resonance imaging an excellent alternative modality without associated ionizing radiation. Our study shows that the sensitivity of multimodality imaging for parathyroid adenomas improved significantly with the use of conventional and dynamic magnetic resonance imaging, even in the case of recurrent or persistent disease

Cost-effectiveness of active surveillance versus hemithyroidectomy for micropapillary thyroid cancer.

BackgroundThe management of low-risk micropapillary thyroid cancer &lt;1&nbsp;cm in size has come into question, because recent data have shown that nonoperative active surveillance of micropapillary thyroid cancer is a viable alternative to hemithyroidectomy. We conducted a cost-effectiveness analysis to help decide between observation versus operation.MethodsWe constructed Markov models for active surveillance and hemithyroidectomy. The reference case was a 40-year-old patient with recently diagnosed, low-risk micropapillary thyroid cancer. Costs and health utilities were determined using extensive literature review. The willingness-to-pay threshold was set at 100,000/quality-adjusted life year gained. Deterministic and probabilistic sensitivity analyses were performed to account for uncertainty in the model's variables.ResultsActive surveillance is dominant (less expensive and more quality-adjusted life years) for a health utility <0.01 below that for disease-free, posthemithyroidectomy state, or for a remaining life expectancy of <2 years. For a utility difference ≥0.02, the incremental cost-effectiveness ratio (the ratio of the difference in costs between active surveillance and hemithyroidectomy divided by the difference in quality-adjusted life years) for hemithyroidectomy is <100,000/QALY gained and thus cost-effective. For a utility difference of 0.11-the reference case scenario-the incremental cost-effectiveness ratio for hemithyroidectomy is $4,437/quality-adjusted life year gained.ConclusionThe cost-effectiveness of hemithyroidectomy is highly dependent on patient disutility associated with active surveillance. In patients who would associate nonoperative management with at least a modest decrement in quality of life, hemithyroidectomy is cost-effective