Selim Shawky Elsayed Tealib <br/><br/>
A proposed professional development program based on blended learning to develop secondary stage teachers of English competencies and its effect on their students' achievement /  
 برنامج فى التنمية المهنية مقترح قائم على التعلم المدمج لتنمية جدارات معلمى اللغة الإنجليزية بالمرحلة الثانوية وأثره فى تحصيل طلابهم 
Selim Shawky Elsayed Tealib ; Supervised Awatef Ali Sheir , Marwa Mohamed Elmohamdy 
 - Cairo :   Selim Shawky Elsayed Tealib ,   2021 
 - 187 P . :   charts ;   25cm 
<br/><br/>Thesis (Ph.D.) - Cairo University - Faculty of Graduate Studies for Education - Department of Curriculum & Methods of Education 
<br/><br/> The purpose of the present study was to investigate the effect of a blended learning training program on developing the EFL teachers' professional performance in the light of 21st century competencies for the Secondary stage. To fulfill the purpose of the study, a quasiexperimental study was conducted including two random samples, each consists of (60) EFL in-service teachers in four Secondary schools in Giza Governorate. Instruments included; a Need Analysis survey, an EFL 21st century competencies Questionnaire, a preand post-test on competencies, and a Rubric and an observation checklist to assess the delayed effect of the program. The blended learning program was administered for about (20) hours. The findings of the study revealed the significant difference between the preand post- administrations of the teacher's competency observation checklist in favour of the post administration. Results also revealed that the proposed blended learning training program had a significant impact on developing the EFL teachers' competencies related to their (Professional Knowledge, Professional Skills, Attitudes and Values). The observation showed that the training had a delayed effect on the participants and their students. The study recommended using blended learning to develop EFL teachers' professional and pedagogical competencies in the light of 21st Century Skills in different educational stages 
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<br/><br/><label>Subjects--Index Terms: </label>Blended learning  Professional development   Teacher's competencies