You worked part time for a company in the past and now see an advertisement for full time

You worked part time for a company in the past and now see an advertisement for full time work at the same company. You want to apply for the job.

Write a letter to the hiring manager.

In your letter
Describe the part-time work you did
Explain why you want the full-time work
Tell him/her why you think you will be good at the job

Begin your letter as follows:

Dear Sir or Madam,

Dear Sir or Madam,

My name is Cindy Huang and I am writing to express my interest in the position of full-time Teacher at your school. As you may concern I am used to work as a part-time Tutor before and my work experiences help me be a qualified candidate for this job.

In my previous part-time work at your school, I ran after school tutoring club where I worked one-on-one with a variety of students who are struggling in math and science. I also designed individual study plans with the help of classroom teachers. We had regular meetings to collaborate on developing programs to help students overcome their personal challenges. These experiences help me grow to understand the difficulties that some students have and to learn how to help them overcome their struggles.

The reason why I am interested in this full-time position now is that I am ready to return to work after taking my time to be with family, as my youngest child is ready for school now. I have spent three years for my university degree and now I have completed my master in education. I can teach ESL and science and I am eager to use new skills to teach.

I believe that I am an excellent candidate for two good reasons. I know the school, the teachers and the curriculum. Previous part-time work experiences gave me an edge that I am very familiar with the working environment. I also have a proven success record that the attendance at the tutoring club grew when I was there, and teachers reported students who were in struggle with math and science improved their academic results with my help.

Should you require further information, do not hesitate to contact me. Please find my CV attached. I am looking forward to your sincere answer.

Yours Faithfully,

Cindy Huang

@kev2
Hi, I'm going to show you my personal ideas. Hope these suggestions are useful.
- struggle with/against (not "in")
- I also designed ... the help of classroom homeroom teachers. (instead of saying this way, you can try this: I also assisted the homeroom teachers in designing study plans for every individuals.)