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We have developed an easy-to-use online tutorial generator designed to allow instructors to make tutorials quickly and with a minimal learning curve. The motivation was to create a generator that would allow instructors to create tutorials as needed and possibly build up a bank of tutorials over a number of years. A key design feature of the online tutorials was the inclusion of branching pathways through the material to provide targeted remedial aid for conceptual difficulties as they appear. We tested the generator by creating a small number of online tutorials that focus on areas where typical first-year students encounter difficulty: vectors, Newton's second law, circular motion, and rotation. We found that students using the online tutorials achieved a better result on the related online quizzes and final exam questions for these topics. The results of our analysis indicate that the online tutorials have been partially successful at reinforcing these key concepts.

Abstract: Purpose: The purpose of this case report is to highlight the clinical characteristics of a recurrent chalazion through the use of digital photography and ultra-high resolution optical coherence tomography (UHROCT). Case report: A single case is presented, along with digital biomicroscopic photographs and UHROCT images. Discussion: A review of the literature describing the histopathological and associations of chalazia and other disorders, suggest it may be possible to differentiate different eyelid conditions based on their clinical manifestations and appearance on UHROCT tomograms. Based on the images presented here, it appears that this case is typical of a post-menopausal incidence of chalazion and risk for acne rosacea. [Copyright &y& Elsevier]