This paper describes the improved science conceptions and orientations for teaching about Nature of Science that resulted in a group of doctoral students who took a Nature of Science graduate course. This paper was a result of a panel discussion at the 2021 International Conference on Social and Education Sciences (IConSES) in Chicago, IL. The format took a reflective view on the past course, and how the doctoral students made changes in their ideas about NOS and their teaching practices. Reflections were made across themes that included Early ideas about NOS, our orientations to teaching about NOS, the world outside our window, and teaching NOS, and teaching NOS, past, present and future. Recommendations are made for beginning NOS instruction as early as kindergarten and embedding it in science content throughout all science education, making it a part of instruction similar to how scientific practices are similar to instruction.

Rohingya refugee children, a persecuted minority, should have the opportunity to acquire the level of scientific literacy necessary to survive and thrive in an increasingly scientific world. Unfortunately, our understanding of the role science education holds in the various educational policies that guide the programming for Rohingya refugee children in the camps in Bangladesh is minimal. The purpose of this study was to enhance that understanding. A vertical axes comparative case study approach was used to compare and analyze the policies at the global and national levels to elucidate the existing inclusion or lack of science and scientific literacy for the Rohingya refugee education system. Findings showed that the educational policies fall short in supporting and promoting science and scientific literacy along with numeracy and literacy. Based on evidence on comparison between global and national policies for education for Rohingya refugee children, this study led to the development of recommendations for enabling policies and inclusive science and scientific literacy can pave the path for a better future for the prosecuted Rohingya refugee children.

2D Photonic Crystal is investigated to find photonic band gap for the purpose of biosensing at THz frequency region. Several structures, one consisting of air holes in Si background and the others consisting of air holes filled with different analytes of having different Refractive Index (RI) in same Si background are considered. For each structure the change in photonic band gap due to the change in RI is observed and shown graphically. By comparing this plot with a standard chart of RI of different materials, any unknown biological analyte can be identified. Thus a biosensing method is developed by using the relationship between RI and band gap of photonic crystals. By comparing and calculating from the relationship; the maximum sensitivity of the developed biosensor is found to be 66.6%. DOI: http://dx.doi.org/10.3329/dujs.v62i1.21952 Dhaka Univ. J. Sci. 62(1): 7-9, 2014 (January)

Research on Nature of Science (NOS) conceptions and identity development for NOS contains a gap in the realm of examining doctoral students aiming to be science teacher educators. This research examines the NOS identity development of participants in a course focused on the philosophy of science and research about NOS education. The data analyzed for this study were recordings and notes taken during class discussions in a NOS seminar, as well as NOS research and teaching assignments associated with the course. These data sources were analyzed for development of four influences on identity development for NOS: 1) personal influences on NOS identity, 2) contextual influences on NOS identity, 3) competing identities with NOS, and 4) persistence in overcoming barriers to development of a NOS identity. Findings emphasize the need to target NOS identity development among teacher educators, as they hold the primary responsibility for instilling a NOS identity in their own students, who are future teachers.