The aim of the research is to identify the teachers’ views on the reasons for the students’ low level in mathematics according to various variables, including gender, academic qualification, specialization, and experience. It was relied on a questionnaire prepared to measure the reasons for the low level of students in mathematics. It consisted of (28) paragraphs, each paragraph representing the possible reasons for this decline. The study was applied to a sample of (150) male and female teachers representing 65% of the original study population in a number of schools in Babylon Governorate - Iraq.

The purpose of this paper is to develop the wave equation v_tt-v_xx=0 through the use of an optional function B(x) and some initial and boundary conditions, where the existence and uniqueness of the solution have been demonstrated by using the maximum and minimum principle, we give examples which show that the possibility of drawing.