P rior to the blight epidemic, American chestnut (Castanea dentata Borkh.) was one of the most important timber and nut-producing tree species in eastern North America (U.S. Census Bureau 1908). Its native range extended from southern Maine and Ontario in the north to Georgia, Alabama and Mississippi in the south (Sargent 1905). It now exists primarily as stump sprouts across its entire native ...

the aim of present study is providing an explanation of the roles that different aspects of the science nature play in teaching science. through a holistic attitude according to complexity theory, it is argued that raising philosophical questions in history, sociology, and psychology helps in clarifying the nature of science. according to the findings, there is a need for a revision in the indu...

The New York City Foundation for Computer Science Education was launched in the summer of 2013 to ensure that all children in New York City public schools have access to computer science education. Over the past year and a half the foundation has worked with eight (8) programs to expand access to computer science, reaching more than 10,000 students in the 2014-2015 school year alone. In this pa...