Seokmin Kang

In-service teachers must be provided with high-quality professional development (PD) opportunities that not only effectively improves and develops their skills, but also engage, and motivate them to continue growing. In this project, we studied in-service teachers’ perceptions, opinions, and mindset toward the use of mixed-reality simulations (MRS) as a potential tool for PD to advance and enhance their pedagogical knowledge for mathematics. We followed a convergent parallel mixed-method approach with 49 in-service teachers who were exposed to a series of simulations sessions. We found evidence that the use and integration of technologies like MRS as a tool for PD is considered to be an approximation of practice well accepted by the teachers. In addition, the majority of participants perceived the tool as an effective-unique strategy to develop skills related to questioning, eliciting and assessing students.

The transmission of COVID-19 suddenly shifted most school classes to online lectures, and these unexpected changes often exacerbated existing imbalances by region and school. Our study used land price data as a proxy for regional wealth and empirically examined the inflation of education inequality between the areas with high and low land prices during the COVID-19 pandemic in South Korea. The gaps in the average high school Math and English scores between 2019 and 2020 (Y1 effect) and 2019 and 2021 (Y2 effect) are used as the main educational outcomes. We utilized the spatial difference-in-difference (DID) method to reflect the spatial autocorrelation on the school-level distribution of the score changes. The impact of the online class conversion on student performances was found to be significantly different between the regions with low and high land price and was more noticeable for the Math score during the first year of the pandemic. During the second year of the pandemic (2021), the scores increased in both regions, but the regional gap remained persistent. Evidence-based policies should be implemented to enhance regional educational conditions and resources, which, in turn, should prevent educational inequality across the regions stemming from the conversion to online classes.