In this book Kyong Hwa Lee combines the art of origami and the science of flight to create unique paper airplane designs for aviation enthusiasts of all ages. Featuring thirty-two designs, Amazing Paper Airplanes showcases models resembling real-world aircraft, including the F-22 fighter jet, a P-51 World War II plane, the Convair F-102 Delta Dagger-the first supersonic delta-wing interceptor airplane of the US Air Force-and more. For these models, Lee provides information along with an image of the real plane to encourage interest in aerospace technology. Every design has been flight-tested and presents complete step-by-step folding instructions. In addition to showing basic and advanced folding techniques and providing templates for each plane, the author explains the theory behind flight and offers tips to fine-tune paper airplanes for optimal flying.

This study started from the question "how does learning occur in human life." In particular, I am interested in learning that takes place continuously anywhere at any time rather than learning that is occurred by being taught by others. This study interpreted critical reflection as learning that continuously occur in anywhere at any time i.e. as informal learning, and then analyzed the process how it takes place in human life. To find out how critical reflection occurs, this study focused on factory workers' critical reflection while working on the shop floor. Using ethnography methodology I analyzed the observed and interviewed data of factory workers' working life in order to examine critical reflection as informal learning. In this process, I used Cultural Historical Activity Theory (CHAT) as the theoretical framework in order to elaborate the process that critical reflection occurs while working. The analysis using CHAT was helpful to find out workers' critical reflection as expansive learning that continuously promotes the other learning. That is, factory workers' learning activity on working life was gradually expanded to the new pattern of activities such as forming good rel