A Master Thesis entitled”The Effect of Using an Educational program Based on strategic Competence in Mathematical Understanding and Mathematical problems Solving among Students Sixth Grade in the Direztorate of Education – South Nablus” (in the Program of Methods of Teaching Mathematics) by”Ruba Al-Rabi” will be defended on Sunday 19^thJul.2020,  under the supervision  of ”Dr. Souhiel Salhah & Prof. Naji Qatanani” by (10:0 0 ) am in the Korean Institute.