Ask for an interview. In this video, I walk you through how to write an effective, succinct, and impactful cover letter.A cover letter should be one page, no more than four paragraphs, easily scannable and include the best way to reach you. Format your document. Please send me an employment application. I am very interested in talking with you further about possible employment opportunities with your school district. Learn how to write an student teacher cover letter. Get expert tips and downloadable cover letter examples for all levels of experience. Below is a sample cover letter for a teaching position, assuming you have completed your B.Ed. (Bachelor of Education). I am writing in regards to the Elementary Teacher opening advertised on the San Antonio Independent School District job board.