A proposed unit in femto-chemistry and its impact on the development of cognitive achievement and scientific values among secondary school students

 The current study aimed to determine the effect of teaching the content of a proposed unit in femto chemistry to high school students on cognitive achievement and scientific values. The student’s handbook and teacher’s guide were prepared to study the content of the proposed unit. The researcher also prepared tools to measure its impact on cognitive achievement and scientific values ​​in the dimensions of scientific honesty, curiosity and perseverance. Acceptance of criticism and appreciation of science and the efforts of scientists. One of the most important results of the study was the existence of statistically significant differences between the mean scores of the research group students in the degrees of the pre and post application of the achievement test and the scale of scientific values ​​in favor of the post application. These results were interpreted to the efficiency of the proposed unit in femto chemistry. In developing the scientific values ​​of the students of the research group and its effect in providing the opportunity for students to enjoy the non-traditional content of the units they are accustomed to in the various subjects that they study, including that they have a renewal of their abilities to comprehend and understand this new content, and to study content topics in different ways, means and activities included in the student handbook. Easy for students to understand and interpret for all levels, and reviewed The researcher has a number of recommendations emanating from the study and is training student teachers in the Faculty of Education, Chemistry Division, to teach a course in femtosecond chemistry and to develop a chemistry course, so that it includes the femto chemistry unit. She also made several proposals for some future directions.