Career and technical education was founded on the common practice of apprenticeships integrated into the public schools at the beginning of the 20th century as manual arts, which continued to evolve into a culture and practice of its own as vocational education, and into what is now career and technical…
Career and technical education was founded on the common practice of apprenticeships integrated into the public schools at the beginning of the 20th century as manual arts, which continued to evolve into a culture and practice of its own as vocational education, and into what is now career and technical education,with an evolving focus on college and career readiness. This study sought to collect and compare the perceptions of superintendents, principals, assistant principals, and deans who were affiliated with ten Northeastern Arizona high schools, which were members of Northern Arizona Vocational Institute of Technology (NAVIT) to seven similar sized high schools in rural Arizona, which were not affiliated with NAVIT. The NAVIT schools were members of the Joint Technological Educational District. The member schools were required by intergovernmental agreement to operate their career and technical education programs by specific guidelines and curriculum.This study also compared the combined average academic achievement of the 2011 CTE concentrators of the NAVIT high schools, the non-NAVIT high schools, and all Arizona statewide CTE concentrators. Both NAVIT and non-NAVIT administrators were administered a survey, designed to measure perceptions of college/postsecondary preparation, career guidance and counseling,academic tracking, and curriculum. Results revealed that both NAVIT and non-NAVIT administrators were supportive of career and technical education, but for different reasons. The NAVIT administrators tended to view students in career and technical education programs as more mainstream, with college opportunities. The non-NAVIT administrators supported career and technical education as a system of programs that offered students opportunities for success, whether college bound or not. A significant number of NAVIT and non-NAVIT administrators opted for no opinion responses for several potentially controversial survey questions, which suggested discomfort with the topics. The academic achievement of the NAVIT, non-NAVIT, and statewide CTE concentrators as measured by the Arizona Instrument to Measure Standards pass rates were marginal between groupings. The statewide average was highest, followed by NAVIT, and non-NAVIT. Recommendations for further research include conducting personal interviews of administrators to better assess leaders' perceptions of career and technical education and their influences on the academic and postsecondary career successes of students.
Leonard Hayflick studied the processes by which cells age during the twentieth and twenty-first centuries in the United States. In 1961 at the Wistar Institute in the US, Hayflick researched a phenomenon later called the Hayflick Limit, or the claim that normal human cells can only divide forty to sixty…
Leonard Hayflick studied the processes by which cells age during the twentieth and twenty-first centuries in the United States. In 1961 at the Wistar Institute in the US, Hayflick researched a phenomenon later called the Hayflick Limit, or the claim that normal human cells can only divide forty to sixty times before they cannot divide any further. Researchers later found that the cause of the Hayflick Limit is the shortening of telomeres, or portions of DNA at the ends of chromosomes that slowly degrade as cells replicate. Hayflick used his research on normal embryonic cells to develop a vaccine for polio, and from HayflickÕs published directions, scientists developed vaccines for rubella, rabies, adenovirus, measles, chickenpox and shingles.
Although best known for his work with the fruit fly, for which he earned a Nobel Prize and the title "The Father of Genetics," Thomas Hunt Morgan's contributions to biology reach far beyond genetics. His research explored questions in embryology, regeneration, evolution, and heredity, using a variety of approaches.
