I will add some ideas I want you to add in the writing only add the ideas and put it in a creative way. also I will add some of my targets in my studies you could also add. USE the idea only with your own creative word. As you can see I am applying to have my PHD in Educational  mathematics
.
In second opinion I want you add a good targets that may help my admission

I have a bachelors degree in mathematics from Dammam University and a Masters of Arts in teaching mathematics from King Saud University, Saudi Arabia. Please find attached my CV, certificates. The reason I am contacting you is that I am looking for a supervisor for my PhD project, and it would be an  excellent opportunity to be under your supervision.
   
    The topic that I am interested in is the reality of the Assessment Practices supporting building learning among for Mathematics Teachers at the Intermediate Stage.  The aim of the research is to identify the extent to which mathematics teachers in the intermediate stage practice the types and methods of assessment, also to reveal the extent to which mathematics teachers in the intermediate stage integrate the assessment practices in the teaching practices. It also to reveal the extent to which the teachers of mathematics in the intermediate stage use technology in the assessment practices.
       
    I would be grateful if my proposal interests you so that you would become my supervisor. If it is not quite the topic you feel comfortable with; perhaps you could suggest changes that would make it more suitable. I would be very grateful for your prompt response.
   
    That science has no borders, no homeland, and the human being to move and migrate in order to obtain knowledge, and motivated by curiosity innate, and identify everything that is new, and I continue to follow the impact of adults.