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The present study aims to identify the effect of free reading in the development of In-depth reading skills and some skills of the twenty-first century teachers' students. The study sample was determined through the application of questionnaire on free reading on a group of (500) students of the first year at the Faculty of Education - University of Sadat City, Egypt. Two groups of students representing the research sample were selected as experimental group of (50) students who love free reading and practice in their lives periodically and regularly, and a control group of (50) students who do not like free reading and do not practice. A test of reading In-depth reading skills, scale twenty-first century skills. The results revealed that, there are significant differences (p≥0.01) between the mean scores of the experimental and control groups in the post application of the 21st century skills scale, also increase the impact of free reading in the development of In-depth reading skills and 21st century skills of teacher students. [ABSTRACT FROM AUTHOR]

This study aimed to investigate the effect, of developing educational unit (chapter) based on 21st century skills in development of academic achievement and math self-esteem among sixth grade's students. The study adopted quasi -experimental approach, which utilized nonequivalent pretest and post- test control group design. The sample consisted of 32 sixth grade's students who divided into two groups; 15 students represent the experimental group, and 17 students represent the control group. The researchers used two data collection tools, which are; the achievement test, and the mathematical self- esteem scale. The study have found that there were statistically significant differences at the level of α≤0.05 between the scores of the experimental and control groups in the post-testing of both the achievement test and the self-esteem scale in favor of the experimental group.In light of the study results, the study provided number of recommendations, including: the development of mathematics curricula at the elementary level in the light of the 21st century skills. [ABSTRACT FROM AUTHOR]